I haven’t done it in a couple years, but I used to autocross pretty regularly, and my autocrossing habit figured heavily in my decision to buy my Miata. I even did well enough to amass a nice collection of trophies, including a couple from SCCA National Tour events.
Around the time I got the Miata, SCCA opened up Solo to shifter karts and I seriously considered getting one for a while.
If the bug bites you, it’s not a bad way to go. Miss those toys, I may have to get back into it and have my grandkids get a little 80CC centrifugal-clutched round track kart. They are 2, it’s about about time to get them going!