In my experience you need to upgrade/recompile brew apps on every major upgrade (at least I have had to do it for last four or five). I suppose you may have be

In my experience you need to upgrade/recompile brew apps on every major upgrade (at least I have had to do it for last four or five). I suppose you may have been able to avoid it if your installed apps happened not to link to any system libraries? If they do though, and the system libraries change, how can the brewed apps possibly be unaffected?