Aren't the games you discuss sorted on the basis of their Metacritic score? Hence the supposed popularity.
Oooh, the order I listed them.
Ok, here they are again, out of order and without any reference to order for you:
Freedom Force. I'm afraid I don't know much about that and it's current playable state as I've never tried it.
Warcarft III, I think there's still lots of people who play that one. In fact this game was the headline news game just this year across the entire gaming world.
Neverwinter Nights, a game that's been relevant and played by many for each and every year since it was made.
Ah, now we get to Morrowind, ah well, nearly at the top, always the bridesmaid, never the bride, eh.
Might and Magic IX. Yeah, not sure I'd say this was ever 'playable'. Nor played really.
Dungeon Siege. Again, one I've never played but I haven't heard that it's unplayable from people who've said they've replayed it recently.
Age of Wonders II, not really RPG, but in the ballpark and is one of those genre benders that gets talked about a lot round here. Yes, I played this one this decade and I believe it's a good seller on GoG and new AoW games are a still a prominent feature of the gaming world.
Icewind Dale 2. Apparently this struggles on Windows 10, though I've never tried so can't confirm, but is known to be a bestseller on GoG. This one could well die due to software incompatability, but not because people don't want to play it or because the game is difficult to play generally.
Divine Divinity. Well, I'm sure there must be people still digging into this, what with Divinity being such a big current name.
Heroes of Might and Magic IV, yup, same as Age of Wonders.
Arx Fatalis. Yeah, probably not so many people playing this one, I don't know, not really a 'big brand' so…
Can you understand the point provided easier now?