I thought this list of remakes was very interesting.
The thing is, shows like Friends, Seinfeld or indeed Frasier are unlikely to be brought back into production because they still do so well in reruns.....at least that's my take on it. I'd love to see one or some of them do it anyway!!
I was reading somewhere that the stars from Friends were currently earning $27,000,000 per year from syndication of the show. That's more than they were earning when the shiw was being made!