Very simple fix......

Except the guys that engineered the system still used a steering joint that allowed for slip even with the 2 piece steering shaft. Because despite being 2 pieces that are supposed to collapse in case of an accident, it's not designed to take up that slip.

A simple fix isn't always the best.

This is what I did with mine. Not saying it's the best way to do it either, but it does account for the same movement that the factory joint can handle and a simple u-joint can't.
Steering shaft upgrade
Agree.
I guess I should have stated for a car that's driven a few hours a week or so. In my case

Between that and already outdated safety issues on the vehicles construction
compared to today.
I guess everybody enjoying the older cars has to think about that at some point.