Slippi is _amazing_. And as a fan, I'm obligated to point out that it was just one heroic developer: Fizzi. Fizzi made Melee playable at IRL speeds over an internet connection, completely coincidentally, just before Covid.
The silver lining is it makes you feel less bad if you eventually have less time for melee. I miss the old days when I would play 14 hour sessions... oh right a lot of that was people taking breaks and complaining about hand pain