I'm old too. (45) and I have 2 cars in $30K-$40K range.

I would buy the self-driving car (2 of them) because I could read in traffic, or relax while listening to music, or watching a movie.

And if tired, on the way to Vegas from LA, push "autopilot button".

It's safer to let autopilot drive than to try to drive sleepy, trust me.