@jonossaseuraava @kaia @Erik i mean.. it's not impossible, but there's no preexisting tools for it, you're probably on your own unless you find someone who is also trying to accomplish this. You'll have to figure out how mastodon stores its stuff and how pleroma stores its stuff, create a way to convert those (which is going to be lossy), deal with the fallout - federation issues, relation issues (i.e. how to deal with replies, missing indexes, missing data etc).