Right? They will last a long long time in most cases. Sure, they might start leaking eventually but 90+% of the time that will probably take a decade or more to start happening. It's not worth the gamble of course but if you want to apply a more permanent fix at a later date they will work fine. Funny enough an outdoor hose bib is probably the best application for one since those take a beating and need to be replaced pretty often anyways and likely need to be replaced well before the sharkbite collet and o-ring wear out.