There are basically two types of people in the SSB community (not including say, smash 64 and PM players):
Melee players, and everyone else, who will just always play whatever game is the newest. Why is this? From where I stand, I see it like this. Those who stick to melee do it for one reason; it's a superior game. This is not to say that, for example, smash 4 or even brawl are bad games, it's just that, objectively, melee is better competitively.
The reason to play smash 4 is.... Well, personally I don't know. I got into competitive melee only last spring, and I mean spring of 2018. I'm kidding, though, I think I see the reason to play smash 4, and ultimate when it comes out. It's just more fun for every reason that isn't seen from a competitive point of veiw. Brawl had a FAR better one player mode than melee, so, if you don't really play smash for the sake of competition, then you had every reason to play Brawl, a game considered to be inferior.
Anyway, reply if you disagree, and please, say why.