Wouldn’t be too bad. I use Keepass for my bookmarks and most of my accounts with the database synced by Syncthing. If Syncthing and all of my devices also went down it’d be a pain but I’d have a fairly recent copy of the database which I backup to a pen drive I always keep with me. I’d have to spend a day logging into my accounts and updating the email but then I’d probably go back to just using Keepass from my pen drive and backing up to a second one like I used to until I found another solution for syncing it.