I think the thing that most prevents a game from getting to my table is time. I play a six hour f2f game slightly less often than every other week. When we played Torchbearer, for instance, we played 14 sessions. That’s more than half a year. I buy something like fifteen or twenty games per year. We sometimes play one-shots or even fit two or three quickie sessions into one of those meetings, but mostly we play short campaigns. There’s just no way to get them all to the table.

ETA: I ran Clay for three or four sessions in playtest, but I quit in frustration. I felt like I failed to deliver the fun. But I have every reason to think it would be fun with someone who knew what they were doing.