Yeah, as per gzt, (non plug in) hybrids from Toyota / Lexus at least have been proven highly reliable over decades.
While the complexity seems bad on paper, in reality they are considered some of the more reliable vehicles on the road. Perhaps the biggest thing is the eCVT transmission used in these cars avoids many of the weaknesses in conventional Auto, CVT & Manual transmissions.
Below example has made it past 500,000km
https://www.trademe.co.nz/a/motors/cars/toyota/camry/listing/4827365591
I don't really consider (non plug in) hybrids as a stepping stone to EV's. I just consider it a simple hack go ~40% further on the same amount of fuel. (A very impressive win, well worth having).