I've stopped considering mods a selling point myself. More often than not, I turn to them to fix problems I have with a game, and if I have to use mods to make a game even halfway decent, is it really that good of a game? Never mind how long it can take to make all sorts of mods actually work together, as is shown to be the case with Bethsda's games, and I just don't have that kind of time anymore. Furthermore, as games become more resource-intensive, mods that add actual meaningful content become fewer and farther between, to the point where they come out years after the original game, and by that time, I've already moved on to other stuff (that's usually better right out of the box).