Exactly. Nintendo is sort of known for crazy overcommitment. They really commit to the bit, wherever the wackiness takes them. Two screens? All in. Funky controller for 3 handed people? Ship it.
Nunchucks? Say no more.

Moving their entire line to a single portable device was probably one of their safer bets.

Sony though, everything is very much a slight twiddle of the prior version, and as you say, the side hustles all end up in the bin - sometimes with very little notice.