Inspired by this question What rules are known for Chaturanga?
Chaturanga seems quite interesting, and some aspects of it, like no castling are being introduced in other variants: Kramnik's chess. Given that, say, lichess.org has so many variants, is there a reason why Chaturanga is not of them?
The rules are not exactly known.
Queen (Mantri) is much less powerful and pawns don't have a 2-square move option on the first move, which makes the game less interesting / drawish to many people.
Strategies were developed to draw fairly easily, (and that's why rule changes were introduced). This is a stronger version of 2), and probably not likely.