Before anything, as always, if possible do a snapshot of the host, ackup the database and enable maintenance mode on Nextcloud so no clients communicate with the server during the process.
banned MS in 1998 off my home and using *unix systems for private
Did a do-release-upgradeand the trouble started. It was really a hard one.
Nearly no apache module was migrated and fpm is a beast, at least for me.
Had to adjust a few other things like pecl (php-pear). Good to have a copy of /etc.
Miss my Araxis Merge from work So much quicker to compare and merge stuff than using the shell.
Now it works again, redis is still bitching but that is ok for today.