Am I the only one who feels Presence of Mind is really underrated?

I know Triumph is really good, but on some champs, like Kassadin, it's absolutely ridiculous. Late game, if you get even 1 kill, you can wipe the entire enemy team with your ult. I would assume it's the same on champs like Cassiopeia, and maybe Swain. IDK, I just feel like people underestimate it a lot.