Nintendo Switch's transition to its successor has already started through the online account system - Meristation

The Nintendo Account system that started with the Switch is now the key to jump into the next Nintendo console, according to CEO Doug Bowser.

A Nintendo Switch Emulator Is Now In Development

Nintendo to use current account system for “smooth transition” to

Transferring a user (after first-time setup has been completed

How to Transfer Your Save Data To a Nearby Nintendo Switch Console

Transferring users and save data, Nintendo Switch Support

Reports claim Nintendo is showing “Switch 2” demos to developers

How to Transfer Save Data Between Users on the Nintendo Switch

YCCTEAM Wireless Pro Controller for Switch/Lite/Oled

Fenolical Switch Dock Station Compatible with Nintendo Switch/OLED