I've never been into competitive Smash, I only ever owned the 64 edition, and I've played the others minimally. I took my time to watch the entire Smash Brothers documentary though, and holy fuck did it drag me in.
Smash reminds me so much of Halo with how the second installment is the fastest, most competitive one, where you have a list of glitches that can enhance your plays if you master them, and timing them perfectly goes down to hitting the right buttons at the right frames in a second. There's still a ton of love for the later games, even though they in many ways tightened up the skill gap, and that's very much like Halo as well. That blows my mind.
Watching this is so entertaining, because it's how I used to look at Halo back in the day. Now I feel like Halo to me is what Smash is to these guys, it's second nature, and everything that happens is already programmed in our minds because of the countless times we've been in the exact same situations. They know what to do just like I know what to do when I get cornered in Halo, but I don't know this game, so seeing all of these combos and tricks is sooo fucking cool. It's bringing me back to simpler times, when I just enjoyed watching something because of how cool it was, and because I knew I couldn't pull it off.