OpenBSD typically doesn't make major changes within a single release (e.g. 5.8), but major changes certainly do happen from one release to the next (e.g. 5.7 to

OpenBSD typically doesn't make major changes within a single release (e.g. 5.8), but major changes certainly do happen from one release to the next (e.g. 5.7 to 5.8). A couple of recent examples that come to mind include the removal of sendmail, removal of Apache, addition of OpenSMTPd, addition of their own httpd, replacing sudo with doas, etc. You definitely want to read the release notes before upgrading or switching to a new version!