Do you ever get that thing where the more you look at a word the more it looks wrong? I'm getting that with "would" and "could" after reading this thread.
The 3DS had backward compatibility with physical DS games.
The Wii U had backward compatibility with Wii games (the Wii could also play GameCube games).
No surprises here - especially if they are going to call it "Switch 2" I'd have been surprised if it wasn't compatible.
3DS cartridges had an extra notch on them to stop them being inserted into a DS. Probably we'll get something similar here or there will be some software mechanism to stop attempts to run the new games on the old system.
Not quite the same as Stones and Kilogrammes are both units of weight. Using cups is like weighing somebody using those luggage size baskets in the airport.
If you're in the UK (and I suspect you're not, but I post this partly to help out others in a similar situation), the NHS have a "Talking Therapies" service for depression and anxiety. You can self refer so there's no need to get diagnosed by a doctor first.
Mastodon, Bookwyrm, Mbin, and I'm also on a test instance of Takahē (Mastodon compatible microblogging platform) which I quite like for the multiple personalities feature.
Maybe you're looking for !folklore@mander.xyz