@ronnz98
be prepared to re-install a number of apps like e.g. signal (if you use it):
be prepared to have issues with mobile data … APN settings may or may not be a solution:
as of now and apart from the above issues I did not experience other major issues regarding settings or the like (for instance all wifis and all account settings (imap, caldav, carddav, nextcloud…) are still available and functioning)
