While some of those are not "successful" they are still alive (same situation as FFXIV!? nearly.) Rift didn't flop, don't know where you got that from, and Aion is the single most popular MMORPG in South Korea. Also, I can promise you they didn't fail due to jumping.
I said it was standard because I wanted the video you said you might make.
Jumping may not be standard, but it is fairly common, and is being seen more and more predominantly in the new titles coming out, new titles from old publishers, old publishers which used to make games without jump.
Really, I just wanted to make a comment at you because it warms my heart whenever I see someone mention jump and some other person starts freaking out, like you did.