There are many many hybrid on the road worldwide already, it is not the like majority spoilt after 5 years, 8 years later.
Stop worry about this.

Getting a hybrid car is about getting and own the new tech and use to it.
It is same like want to use handphone, and worry about the radiation. Pointless worry.

The moment of one wish to own a hybrid, you don't worry the battery will die, car cannot start if battery died etc. already.
Battery died time? Tow away and get it fix.
Same with ordinary car, timing belt broken, tow away and get it fix.
No money to get a new set of NimH if battery died after 10 years? then one should buy cheaper ordinary car.
I find unacceptable that one can afford to buy a 100k hybrid car, and yet claim cannot afford potential around 10K cost battery replacement after 10 years later on.

I sum up, disregard it is part or parallel hybrid.

The moment one worry about battery spoil, battery cost, it means hybrid is not suitable for one. End of story.
No $ to change NiMH after 5 years, 8 years or 10 years, means one is not afford to own the car. End of story.

So what the fuss about if the NiMH pack fail totally time?
The car cannot start, cannot move, then just tow away, and change a new pack.

Even ordinary car, time belt can be broken after 80-100k KM, and car cannot even start also.
Radiator leaking, water pump leaking, car also cannot start.
Just tow away and get it fix.

Every ordinary car after 8-10 years, parts also got spoil here, spoil there.
Choose a car just because can start even if NiMH pack fail time that may only happen once after 8 years or even longer period?
NiMH fails, just change one.
What is the worry?
I don't find this is a good reason to say this is a good car or not.

T or H doesn't pay us to be fanboyism, instead we paid our hard-earned money to own one.
Paid 100k then still provide free self service to promote and posting fanboyism comment?

Unless they do pay us or give special discount for fanboyism, then different story.

Every car has its own drawback and advantage.
If A car has advantage over B car, even we own B car, we just said A is better built car.

One likes the car, because you like the car, not because the car is the best or better than others.

Fully syn also 5K?
Better use mineral oil.

5K is very quick to achieve, for people that travel regularly, almost every 2 month changing oil then.

Last time, I changed oil for every 12k-14K, using semi-syn, drive for 6-7 years, mileage >160K KM, no problem at all. Engine still in tip top condition.

Just because one doesn't like the interior design, it doesn't mean it is terrible in comfort.
Unrelated.
Some may view the design is ok, different people different taste.

No belt at all for Prius C?
So how those aircond, alternator work?

Belt and rubber is cheap only, max hundred buck+, and those shouldn't spoil at least 3-4 years down the road.
I only changed once car belt after 6 years, 120,000km

Myvi if anything spoil or breakdown, I am sure outside got a lot of workshop can fix it.
Hybrid car, no workshop dare to touch at the moment as far as I know.

How to compare Prius C with Myvi, price different already 40~50k, can Prius C save you RM 40K petrol?

Save Rm150 per month, 5 years, only save you Rm8000
10 years Rm16,000.
You need 25 years to save the petrol cost as compared to the Myvi price difference.

Buying hybrid, you cannot count how much petrol save to justify your cost.
If solely to justify the cost, Viva, Saga, Myvi always win miles ahead.