Asklemmy

I think by the definition I gave they'd qualify as a franchise, although for those 3 properties it kind of feels a little wrong to me and maybe I need to rethink my definition a little because they're kind of self-contained shows, they don't really branch out into anything larger than themselves.

Personally I think the IT crowds appeal is somewhat limited, at least in the US (it may have more widespread appeal in its native UK, I genuinely don't know,) to sort of the nerd/techy demographic. The lines certainly get blurry because nerdy types have a lot of influence on how memes spread, but I don't know that it has the same impact on pop culture in general as the other two.

I'm also not certain how much staying power friends has outside of the people who were watching it or at least remember it being on when it first aired. I'm not exactly plugged into what gen z and alpha are watching, but i don't think I hear it come up amongst them very often, and I'm not even sure younger millennials care for it all that much.

The office I think has probably cemented it's place in pop culture whether we consider it a franchise or not. Which is kind of a shame for me personally, because I could never get into it.