We must reach an age when there are other things that take over our interests from cars.
Indeed, I'm 42 and have had various fast/expensive/sports cars all my driving life (TT's, VW's, BMW's inc a 1M, TVR, S6, RS4 etc), but having had two young kids (who are 5 and 2) it realigned my priorities. I was downsizing physically from a Range Rover Sport and I could have gone out and bought a Golf R, RS3, A45, SQ5, Macan GTS etc but truth be told I felt like I'd got to an age where having the most powerful thing would be wasted and a decent driving experience/price/speed would be better, so I got the GTI. I've also become a bit adverse to spunking money on cars so a GTI for £20k less than a RS3 with 80-90% of the driving pleasure/capability of an RS3 seemed the right thing to do.
Horses for courses, I know we all approach things differently.