After Yuzu got shut down I'm not sure what this leaves people with for switch emulators. I'm going to try and find archives and will update the post when I do.
Last windows build: archive.org
Slightly older, but has linux and mac builds archive.org
Okay there we go, a github mirror: https://git.naxdy.org/Mirror/Ryujinx
I'd assume it's a new generation of the Nvidia chip they're using in the switch? It makes sense not to change it too much
There was rumor that it would be fully backwards compatible with the switch library