Is there a manufacturer that can be trusted to not produce a lemon or fail to stand behind them when they do?
Exploding Pintos, dieselgate, GM's X car etc etc.
Is my Hyundai Theta II engine a time bomb or a nuisance.
Are EPA ratings pushing the limits of engineering?
There's good things and bad things about all of them. All warranty departments don't want to spend too much money. Manufacturing and assembly procedures have converged, and parts manufacturers have consolidated, to the extent that they're all built more-or-less the same way nowadays. Everyone buys pre-assembled door latches (for an example) from a certain pretty small core group of suppliers that make door latches for everyone, and those bits and pieces are pretty similar for everyone, and the same thing happens with numerous other suppliers. Of course there will be good points and weak points, and perhaps there are particular things to watch out for, or mitigate via preventive maintenance in some way; that's what the internet is for.
Buy whatever suits your needs ... and then take care of it. Do the oil changes. Use the right fluids. Lubricate latches, locks, and hinges. Follow the maintenance schedule.
My non Sunny S approved vehicles have done fine.