I think it adds fun spice to games when you have a deck that you’ve played a lot.
But otherwise, and especially if your enjoyment in MTG comes primarily from brewing, and then seeing your decks perform, planechase robs you of that by making your decks operate in weird conditions.
It's a very sometimes thing for me. Especially with EDH decks, it can take a game that would already take a chunk of time to play and makes it take longer.
Funny story, in between my original comment and now I actually got to do some Planechase and it was uhhhhh. Well let's say that good company made light of a crummy start to the game. I had played my first lands on my turn one having kept a hand with two lands and two 2-cost rocks and other ramp. Anyway on someone else's turn two they flipped into the plane that did [[Warp World]]. I spent at least five turns waiting for a second land so that was... Something.
I'd still play Planechase ever but definitely only sometimes.