Maybe the depth of a game is related to whether it will scale. Go is played on different board sizes and still works.

If you make a Backgammon board bigger it would just be a slog and no real increase in tactical challenge.

Chess rules dictate a set size of board, which I guess has been refined over time.

If a Go board is made bigger or smaller it just adjusts the problem space, the rules and core of the game remain the same.