They've had LDN in the main build for a while now, I wouldn't advise using that dedicated LDN build, it's quite old and hasn't been updated. The standard one has LDN in the settings under the network tab.
I regularly emulate Switch games on my RoG Ally Z1E, and it pulls it off so fucking well, I haven't touched my Switch since I got the thing (it easily runs every title I've thrown at it at 60fps+higher res, plus I have the ability to mod games if I need to.)
I can't imagine it'll be too difficult for them to emulate Switch 2 games, assuming Nintendo don't catch on to emulation developers too early.
I'd put everything I own and my literal life betting someone will make one. It's happened for literally everything else, the switch 2 won't be different.
Would be hard going after devs that don't blatantly make money off it like Yuzu did. Would also be pretty hard going after anonymous devs not using US based version control or just private. Lot of countries don't care about DMCA either. Yuzu was just very stupid but Nintendo in the worst case isn't all powerful either.
Yuzu is still going. Shit got forked thousands of times the whole week leading up to the takedown. If the Nintendorks think that shit is dead, they have missed the entire point of open source.
They just made working on Yuzu more annoying, even discord was taking stuff down. But it's not like discord alternatives like matrix don't exist. Version control even more so.