About the only thing on that front that’s changed since the 70s have been improved breaks

Actually the biggest difference there is modern tyres. These are considerably better than those in the 70s - for an easy visualisation compare MotoGP lean angles and cornering speed from that era to what even consumer sport touring motorcycle tyres can handle these days (they weren’t cornering so comparatively slow for no reason, the tyres were the main limiting factor).

You also have modern suspension making a marked improvement on road handling, ABS making it so a chimpanzee can get the best braking without skidding, and in the last decade or so ESC has been making a notable difference to stability under braking and swerving. All together the average modern car will outbrake and outhandle an average 70s car by a long shot, particularly when not driven by an expert.