I was replying to that one anon specifically, the one that said that theatre of the mind and not having content is a good PnP. I haven't said anything about Runequest.
Next time better think who you are accusing of brain damage, especially while being the one who can 't see the simple outline of discussion. >
Regardless Runequest outside of combat IS as simple to play as D&D, has a very mature setting and set of mechanics, and does have plenty of content ranging from premade adventures to monster manuals that spare you from most prep.
That's good. I do not understand the "very mature setting and set of mechanics" part, though. Could you please elaborate on that?