It doesn't matter when the connections aren't perfect because a shitty game is a shitty game. If you're playing, say, SF IV, and it's lagging, you cannot use your proper timing on links and what have you because the netcode is delay, and you can only time things based on what you see happening on the screen instead of real time. Shit. Unplayable and meaningless.

If you have even the best rollback netcode, but a shit connection, you will be able to rattle off links with real timing, but you will have to constantly adjust to the state of the game not being what it seems to be because of constant rollback issues. Shitty, unplayable game. The end result is no different.

You're right in that the implementation of one or the other can be good or bad. SF V's rollback netcode, for instance, is not good. I would take a good delay netcode over that rollback netcode any day.

Because, and that's the discussion for me, here. The type of netcode makes no difference really. Only the connection quality does.

And yes, I know people don't agree with me on this here. They don't really, anywhere. People love to just parrot whatever they hear without thinking. Most people here probably don't even play offline, let alone competitively. Even among people who do that, people still disagree with me. I'm fine with that.