[dragontamer]

The modern variants of Tetris are generally called "SRS Tetris" in the Tetris community (ex: Tetris with Friends", but also Tetris Ultimate, or Puyo Puyo Tetris).

Some people don't like the SRS engine however. A lot of things have been added to SRS Tetris, such as bag-randomizers, hold-button, and a slew of "twists" that help you recover from errors.

For people who want to play "original Tetris", it means you have to play the original NES version. And there is a large community of players who really prefer the original style... and not the modern direction that make up the rules of SRS Tetris variants.

As I said in another post: I personally prefer SRS Tetris. But I also give a lot of credit to the players who prefer classic rules: the classic rules are way harder to play. And in some sense: more casual people have played Tetris under classic rules. (SRS Tetris is a newer variant, and a lot of casuals think of the "Hold" button as cheating in my experience).