You may be right about the ramp-up time, though the Switch is only at like 50% of its lifetime and I wouldn't be surprised if the next console is a "Switch 2" or something with backwards-compatibility, given what the other console makers have done
The typical lifetime of a Nintendo console is 5 years (N64 was 1996, GameCube was 2001, Wii was 2006, Wii U was 2012 because the Wii was such a smash success, Switch was 2017). The release cycles have been slowing as of recent but we're far more than 50% in.
What you say is logical when considering things generically, however I’m struggling to remember a decision that Nintendo ever made that was based on what other console makers have done.
