i do spec miata. i also from time to do enduros in another miata.
i dont find enduros to be super fun. in fact, i am always looking for shorter, punchier races. endruos always end up like a trackday with free passing, and very little actual dogfight. and the reason to race spec miatas, is to be in the dogfight. the dogfight is when racing becomes about more than speed. i wish SCCA would go to 15 minute races, 4 per weekend, instead of 2 30 min per weekend. i dont find $/seat time to be a useful metric in any way. in fact, the reverse is more commonly true, the most fun and exciting races, are the short ones where we are all scrabbling, packed up, close.
spec miata:
Endruo (lucky dog):
that being said, miatas are racing on easy mode. reliable, cheap, easy to fix, easier to diagnose. when i race endros i always see all these other "cooler" cars, and then watch them come in for pitstops, broken, always being worked on ... and i go ... why the **** would you play racing on hard mode? we end up on the podium in endurance races with the least HP consistently just by being reliable, consistent on lap time, and not acquiring any penalties from contact.