Why are people so surprised/think it's ridiculous that the trimmed completionist cape requires 5k castle wars games? You get the cape for completing everything in the game. Castle wars professional requires the completion of 5k castle wars games if you did not complete this you did not complete the game so why should you get the true completionist cape?
You're telling me 83 days (or whatever the hell it is) is a reasonable requirement? It's not completing, it's not "becoming good at castle wars," 5,000 games is an absurd requirement. They could have tagged this number onto anything. "Derp kill 20,000 level 21 gaurds." It doesn't benefit anything, you aren't getting better, it's just a requirement to make the cape harder, if not impossible, to get. And as a personal opinion, castle wars is a dead and terrible minigame anyways, which makes the matter even worse.
Note that I have no problem that "playing castle wars" is a requirement. 100 games? Meh. 500 games? Meh. But 83 days of straight playing time is by no means reasonable and realistic.