This is exactly the point I was trying to make. Game mechanics stories and visuals should and often do evolve over time, but the main reason soooo many people still hang on to Melee is because the game mechanics didn't evolve, at least not as a whole. Comparing Melee to Brawl or Smash 4 mechanics-wise, they removed far more than they added. Wave-dashing, L-Canceling, and directional air-dashing are far from "broken." They simply benefit the competitive crowd more than the casual crowd, which was my whole point. On a purely competitive basis, many players prefer Melee for those reasons. It's partially the same reason the newest Devil May Cry game was so poorly received by fans, despite being a hit with those newer to the series. The combat had fewer mechanics and less depth than DMC 1-4, and while it was still a great game on its own, those who had really invested time into the predecessors could easily recognize that something wasn't quite the same. Imagine if the next Pokemon game removed half the types and a bunch of moves that were considered too difficult for new players to grasp. It would hardly be considered an evolution in gameplay mechanics, and I'm sure many people would stick to earlier generations for competitive play. That's not to say Smash hasn't evolved at all since Melee, because obviously it has. Rage mechanics, more unique and niche attacks, Final Smashes for those who like to play with them... Of course there were advancements. But the point was that for players who played competitive Melee, the game simply feels like it's from a completely different series. Aside from the most basic mechanics and controls, there are very few similarities between how the games are played. It's why you see almost no players who are at the top level in both games. If you look at games like Street Fighter, Marvel vs Capcom, or Killer Instinct, many of the current top players have been top players since previous games. If you look at Smash 4, only one of the top players was also a top player in Melee, being M2K. Even then, he's not even at the top of the top as far as Smash 4 players go. The mechanics simply don't transfer from one to another
I mean, this was exactly my point. The differences are real and important, and definitely produce different experiences, hence the split in the community and the reason Melee is still so popular despite being 15 years old. It's not people just hanging on for nostalgia, it's people hanging on for drastic differences in gameplay.