Roblox gets mods and UGC because people wanted to be there to begin with. Mostly children, but still people. I don’t know how to make an apples to apples comparison about how prevalent modding was back then, because there are just way more games out today in general; but there were still tons of mods. Elder Scrolls and the mod community have always been intertwined, and once again, people like what’s there in the first place. Even with the reputation of Elder Scrolls being a game you install mods on, it’s only something like 10% of players that ever install them. I have never modded Elder Scrolls.