Completed. Hope it helps.
I have a suggestion. You may find it beneficial to add a multiple-selection question about the primary types of communities that Lemmy users subscribe to. E.g, "what are the communities you primarily use on Lemmy: Tech, Sports, DIY, Politics, Gaming, Memes/Funny" etc. It will give you a better view of the kind of user demographic that preferred to migrate vs stay on Reddit.
You might also want to add an option for "Niche/special content" as one of the reasons I miss Reddit. Because that is the #1 thing I miss, finding random car subs that could answer all sorts of mechanical questions.