The people who played MUDs for the grind will, genuinely, have a lot more fun playing PoE or some other modern adventure game. MUDs were the only option for that sort of adventure experience for a while but there are other options now that simply have more tools at their disposal than text based communication offers.

If a MUD is going to survive today it's going to be driven by those RP focused players where the freedom to describe actions in text allows a flexibility that's unrealistic in graphical games.