No, he is talking generally about the implementation of start-stop in cars. Alsvin has yet to prove its reliability in everything, so there is no point in discussing that. We'll know when we'll know.
Another thing to mention is that hybrids do the start-stop all the time. The engine stops when the car stops, the engine stops when the car is slow/at a constant speed and there is enough charge in the battery. And the engine kicks in when needed. So if the vehicle is designed with start-stop in mind, there shouldn't be any issues, based on what we know about Hybrids.
The common complaint with 660cc JDMs is because of their low-powered ACs, the car gets hot as soon as AC turns off because in most cars it is barely enough even when Eco-idle is turned off.
But yes, this is another mechanism added to the car, so its performance and longevity depend on how well it is designed, plus it is another maintenance item.
Also, it will not be a problem if we use recommended weight engine oil. If 20W50 is used when the recommended grade is 5W30 or 0W20, then obviously there will be problems.