I felt like there was a whole lot of opportunity to tell a story with this mechanic
like, imagine in the world of Utils that there are regular everyday ones like bzip, but then there's the mysterious super rare "firebird" that upgrades into "phoenix", and eventually into firefox
but perhaps just like in reality the future of firefox is not so bright and it will again become an ominous "Disused" Util in the future, which looks physically damaged and strangely unstable