Nintendo Accounts will continue on the next gen system in the year 20XX

It looks like Nintendo Switch Online, or some form of it, is already planned to be a part of the ecosystem for further consoles going forward.

Nintendo Switch 2: 5 features we want in the next-gen console

Nintendo Is Closing The 3DS & Wii U eShops And Has No Plans To Offer Classic Content In Other Ways

Nintendo wants a “smooth transition” to their next-gen console through Nintendo Accounts - Meristation

Nintendo to use current account system for “smooth transition” to next-gen - Dexerto

Best Nintendo Switch Accessories for 2023 - IGN

Doug Bowser Won't Comment on Switch 2, but Bigs Up Nintendo Account for Upcoming 'Transition' - IGN

Nintendo is said to be showing the Switch 2's DLSS and ray-tracing capabilities to developers

nOS Turns Your Nintendo Switch Into a 'Surprisingly Small Personal Computer

Gaming Statistics 2023 - TrueList

Chart: Nintendo Switch Passes PS4, Looks Unlikely to Catch PS2

How to transfer user data from one Nintendo Switch device to another

Nintendo Switch 2 by 2024 as perspicacious analyst forecasts potential next-generation Nintendo console launch - News

Nintendo Switch with Neon Blue and Neon Red Joy‑Con : Video Games

Nintendo Switch unit sales worldwide 2017-2023