I know all the bad comments about run flats, I have experience using Michelin Pilot Spot and so far has been good.
I wanted peace of mind of not needing spare tyre all over again, so I changed all 4 tyres to run flat again.
Any tips on run flats from you all sifus? I want the best for my BMW.

Run flat is waste of money.

Even the safety that comes from it is not worth the money?
Kind of a bummer I already purchased and switched to them now.

Make sure check on it once in a while. I think i only realize it was flat after days of some minor discomfort in drive. It will be stable and no abnormal sound even if flat. When i check, there was already a large tear alongside it. Maybe sustained days / weeks earlier.

Lol you guy don't have a common practice quick look before drive?like sneak peak left and right only take like 5 second i guess? 😅

I had broken run flat few years ago, the discomfort was obvious as compared to what you said "minor discomfort".
The vehicle steers weirdly and keep attempts to correct itself to be stable, then I go to workshop and they revealed a tear/crack in the run flat, and need to change the whole donut.

Runflat need to use nitrogen ?

Did not know about this nitrogen stuff, it seems to let your tyre last longer before the next air pressure refill?
Run flat still need to pump air just like regular ones.