Well wish to share my thoughts on LCP. For this purpose, I will be speaking from a point of view of a consumer and as a layman who is not as highly educated as you.

I am personally using a mythelogy LCP. To me, the problems you outlined are, with the greatest respect, highly irrelevant and unfounded when it comes to LCP per se. To begin with, the market is filled with so many labels / brands of any product of a similar nature. Regardless of whether it's an aftermarket LCP / exhaust / intake / or any other aftermarket performance parts, certain brands will boast about its long history and/or proven-dyno. That is how the market works, when there is good business opportunity, there will be competition wherein different business entities strive to distinguish their products from the rest. In this regard, the consumers will be spoilt with choices. 

Now, you pointed out that there are tons of aftermarket parts with no history or proven RnD. If you ask me, I don't give a damn as to the history of any given product. When I am deciding between different brands, the utmost consideration in my mind, would be these, 'are they effective, do they work, would it serve my purpose?'. I would ask people whom I deem trustworthy and do my own little research before making my end decision. In other words, the 'history' or the lack of it, will not be crucial. Afterall, we are interested in the present and not the past. Most consumers wouldn't be bothered if any brand has a long history, what excites them are innovation, something which could improve their current station, for whatever it is. Hence it is not uncommon for business to fall despite having a long history, when you cannot keep up with innovation, you're just out of the race- simple. On the other hand, you may have a 'good' history but it can all be ruined overnight. Therefore I am of the humble view that a long line of history or a lineage which can be traced back to Alexander the Great, is not an issue, what more, a problem.

As for proven RnD, I don't know to what extent you mean. When you talk about RnD, are you comparing aftermarkets RnD to the amount of RnD done by car manufacturers? If yes, it's hard for most aftermarket players to compare with major car manufacturers. Afterall, both their focus doesn't cross path in the strictest sense of the word. In any event, most of the aftermarket products are fitted and tested in their own way before making their way into the market. Unless the products are sold by those 'fly-by night' company, a genuine business will not risk ruining their reputation and subjecting themselves to product liability action. Hence, this is also not much of a problem. If this can be perceived as a problem, then I would say that this problem is evident everywhere - many unscrupulous businesses sells all sorts of products which poses safety hazard, be it food, electronics, furnitures etc. Hence the concept of 'caveat emptor'. It's widespread. Something that is understood without having to be brought up.

It amuses me when you talk about googling mythelogy and wiki. For me, if they have wiki, then good as I can gain more info, if none, would that be a problem? Seriously, there are good stuffs or I should put it, 'hidden gems' out there which doesn't have wiki or history. Hahah, seriously, who cares about having wiki or history? I think goodwill is what one should look for rather than wiki or history. My apologies if you hold wiki or history in high regard, cause I feel that it's an irrelevant consideration.

To your question, 'do you want to take the risk of running your car with a product with no history or proven RnD or engineering skills?'.
Well, I'd say that modding car is all about taking calculated risk. Normally one mod their car the best they can in their own way and within their own budget. Some products don't work, some do. We don't know for sure which will work or which exhaust will give the most gain etc. What we can do is ask around and research. As said earlier, most consumers doesn't care about history or proven RnD etc. They are mostly sold when a particular item is proven to give certain % of performance gain and/or certain improvement in drivability, and that improvement and/or gain will not be harmful to the engine. Again, prior to the mod, consumers would never know for sure as they can only base their decision on dyno charts and representation of the salesman, and then confirm it with their own dyno run.

Speaking from my own experience, I have installed an extractor. The extractor has a wiki? No. Has a history? No. Price wise - ok. Quality wise - ok. Feedback from other buyers - good. With that, I decided to install the exhaust. Was satisfied with the performance gain as shown on the dyno chart. So to me, it works and a risk worth taking. Even with that, perhaps there may be other unknown exhaust which performs better?

As for the Mythelogy LCP, i couldn't find the wiki too, nor any history. But I heard relatively good reviews and some bad ones. Decided to get it. Enjoyed slight improvement in driveability, as for reliability, will see how it goes. Risk taken? Yes. Satisfied? Yes. Is that a problem? Perhaps no. No Wiki? Who cares?

Well yeah, that's my thoughts. I also feel that if you're scared of this and that, then don't mod anything. Secondly, if you're concerned with wiki, just remember that it's an online encyclopedia that anyone can edit. Thirdly, if history of performance parts are important, don't keep holding on to past glory(ies).

My humble two cents.