Wii U had two screens (the TV and the Gamepad) so does a downgrade in screen number mean that a console can't replace another console? No it doesn't.
The Switch is a powerful handheld but a weak home console. If Nintendo isn't trying to replace the 3DS with it then the company has an extra...
They should be phasing out the 3DS because switch is a Hybrid which should be taking and converting all 10 Wii U owners and all the millions 3DS owners. It should also try to help focus the minds of the undecided mainstream gamers away from Xbox or PS and instead at enjoying the worse looking...
Nintendo should be phasing out the 3DS so yes it is a stupid move and if they continue this way we could end up with another Wii U situation.
If/when the most popular edition of the game ends up being the 3DS version I expect Nintendo would/will re-evaluate their strategy.