Yeah, never understood why I would want an entire OS running just to blink an LED. I was going to make a pro-Arduino comment but I guess my LED example warrants little more than an R/C circuit and a transistor, ha ha.
(Anyway, I still remember the thrill of writing assembly for a 68HC11 and getting a pair of hobby servos to respond.)
Familiarity - it’s easy for us Linux dweebs to build a pi that can flip an LED, but programming an arduino is an entire new area.