Oof, damn that’s painful to leave behind. The downfall of yt to a completely unusable platform has been awful. Newpipe might let you play without the reminders on mobile if you are interested in trying another app before you make tye leap to a new platform. I’d bet there is a tool on github that will export your playlists too. Sorry, not trying to fix everything I promise. A 14 year active playlist is an impressive thing though and I’d hate to see that lost.