The crazy thing is that the Classic Tetris scene has really blown up a lot (partially as a result of that video) to the point that that video is outdated.

I think the "hold a piece" dynamic of the Tetris with friends is such a good addition that it should be the official version? Agree or disagree?

What has changed since then?

"World championship" was basically a bunch US players and one dude from Canada. That changed in 2018, with players from Europe and SE Asia adjusting to the NES version to compete. In other words, it went from one player managing to get max score on the qualifying day to like 7 IIRC.

CTWC Europe was created in 2015, although it's for PAL version which differs by FPS and DAS speed.

So, is it more advantageous to play at 50Hz or 60Hz?

Or does that matter?

The PAL version was adjusted for the fps change, so while the game looks the same it plays very differently because of just a few values. It was only recently that the first person in the world EricICX maxed out the PAL version.

Here's an in-depth article that explains the consequence of these changes to tapping. https://tetris.wiki/User:Kitaru