Remember Mac font managing apps? I do: I hated them. Extensis Suitcase caused more problems with my old G5 PowerMac than anything else, ever, and I was fairly conservative in my font use back when I worked as a designer.
Thankfully, Macs these days don’t need the user to manually switch fonts on and off: our computers are powerful enough to handle it. Which is why Bohemian Coding ditched its old Fontcase app and replaced it with the shiny new Fonts, an app that is dedicated to just organizing and looking at your fonts.