Ubunti used to have a a tool that did something similar, but that tool is dead now.

I'm very happy to see a successor.

I should like any effort towards linux but telling all of the migrants that they made a bad choice because of snaps stops me from liking it

Very nice! I'd been thinking there should be a standardized guide for switching, but this is so much better!

I can't watch the video, is there a link to a git somewhere?

Good luck to the dev! I think this will be a good tool to help some, and for the rest, hopefully we can get them onto something that fits them better (Mint, Aurora, etc.).