Roboblox could not be farther from MUDs and only people who played MUDs can appreciate the difference. Lets start with the obvious - MUDs use text and "text is the highest bandwidth medium for our imagination" (quote by Bartle, co-creator of first MUD). I recommend everyone watching this video to understand why is text so superior to any other medium: https://www.youtube.com/watch?v=Zctp972y_Eg Incidentally the lockd…
I like to think there's an axis orthogonal to "imaginative capability" that factors into why some people prefer text and some (ok, most) prefer graphics.
An interesting part of this is EVE Online, which has plenty of pretty graphics, but I've never been able to get into that (or any spaceship-based game for that matter), despite being a style of game (sandbox/world-building) that I otherwise really like.
Seeing the screenshots of UO and SWG in the article gives me the chills. I was fully immersed in those games (particularly SWG). It seems that running around a world as an individual humanoid character is the most deeply engaging experience to me.