I wanted to migrate my CSV export from Goodreads somewhere selfhosted but apparently it's not possible. All the selfhosted book trackers I've tried insist on "properly" importing your books and to do that they only consider entries with proper ISBN numbers. Guess what, many of the books I've read don't have those on Goodreads. So they'll simply ignore like 3/4ths of my export. So stupid.
Anyway, I ended up knocking together a shell script to convert the CSV to a plain text file and I'll be updating that from now on. I never really cared about "shelves" and all that other stuff anyway, I mainly need title, author, and when I started/ended reading something. I don't need ratings and reviews to know what I think about a book and if my memory fails I can just read it again.
Back when people I knew were on Goodreads it was fun checking out what the others were reading but they've all left the platform ages ago.