You speak of Tetris like it's some abstract concept that has always existed and is like some eternal truth. It's not: it's a game that was created by one man, Alexey Pajitnov, who also just happen to be "the current IP holder" you dismiss so easily (he's the co-owner of the Tetris Company).

So no, it's not an "abstract game with endless possibilities". Tetris is Tetris, a concrete game made by a great game designer. It gets cloned and copied constantly, so much so that people forget that it was actually authored by a person. Comments like yours erase Pajitnov's authorship and ownership, which he has rightly earned.

Nobody talks of any other kind of media this way, we shouldn't do it about games either. When speaking of Harry Potter, no one thinks of JK Rowling as just "the current IP holder" (she's the author!), and no one considers fan fiction on the same level as the real thing.

The article states "when the game plays, the tetrominos are selected at random". When it comes to standard Tetris, as defined by the Tetris Company, this is incorrect. I was correcting the error. Obviously you can do it however you want, but that is how Tetris does it.

As for what's more fun, obviously opinions can differ. But as someone who plays a lot (A LOT) of Tetris, I personally vastly prefer the 7-bag system. It really opens up the game strategically, and it allows you to play much faster.