Historically they have to reinvent the wheel to make a hit. Wii was the winner because motion controls were new to console gaming. WiiU flopped hard due to banking on the existing tablet tech fad, which was beginning to fade. Switch used their handheld brand power which is unmatched and funnelled that into the console space. Genius.
I think as long as their dedicated handhelds are dead, their consoles can bank off their console/portable fanbase at the same time no matter what they do so long as compact portability remains a key feature.