

Seatbelts, disk vs drum and antilock brake systems, crumple zones, backup cameras, suspension design (wishbone, progressive spring rate) for handling.
I will concede the backup sensors. Those have worked pretty well, though still give false alerts occasionally. Auto headlights/wipers are also another plus, but more of a gimmick.
Other than that, there are better electric/hybrid/engine efficiency which is all good. New models and styles which can be interesting, and cars got fat, which isn’t too good. But the actual technology for safety features used to keep people safe today, is basically the same as almost 25 years ago. Old cars from today’s perspective are not like the old cars from the 1990’s perspective.
Uh, I think we’re arguing the same side here.
Edit: I thought of one: auto braking systems. That’s one significant safety system invention since 2000. It’s a bit more than just a nag or gimmick.