The 90s was decades ago. I don't see many 2010 kia on the road.

You can't know the quality of new kia "for decades".

I still see 90s and earlier cars on the road all the time (nearly daily). I owned one until 2020, when someone totalled it while parked for me.

1990s cars aren't any more prone to rust than cars now, the rust is just hidden under the plastic panel. That plastic panel isn't doing any of the work of the frame though. Shit and gilded shit are both piles of crap even if one looks better at first glance. Especially when you consider how much thinner modern car frames are which means there is less to lose before failure, assuming the electronics even last that long.

Spoken like someone who has never spent time around old cars. The 90s cars were already enshittified