OpenBSD typically doesn&#x27;t make major changes within a single release (e.g. 5.8), but major changes certainly <i>do</i> 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 <i>definitely</i> want to read the release notes before upgrading or switching to a new version!