Switch in my personal opinion.
Tears of the Kingdom and Mario Wonder were incredible, Metroid Prime Remastered sets a gold standard for remasters/remakes, their first party lineup as a whole was the best its been since 2017, third party support remains steady, and there's no sign of the usual end of life slump Nintendo consoles go through.
It's rare for a system to remain compelling to me by the time it gets to this age, and while I admit I'm ready for their next system, its also nice that the Switch is going out gracefully.