It's not just a drop-in glyph replacement. The 2 is a number that can, and frequently does, disappear.
e.g. You would never write the area of a circle as (2pi)r^2/2
Are you really saying that he should have chosen a letter from the Hebrew alphabet as a glyph? Sure, it has no collisions, but it's completely bizarre and unlikely to gain widespread adoption, which is the whole point.
e.g. You would never write the area of a circle as (2pi)r^2/2
Are you really saying that he should have chosen a letter from the Hebrew alphabet as a glyph? Sure, it has no collisions, but it's completely bizarre and unlikely to gain widespread adoption, which is the whole point.