Nobody makes games that can run on an old Atari anymore (well, perhaps, except our beloved ex- forum member Ulillillia :D).
It will take only a few years until nobody makes games with shader 1.0 anymore either.

So, it's fine if you want to create a game with 1.0 shader support... it merely means you're a dying species anyway.

Oh btw, how many of us can produce a good working (not to mention good looking) 3.0 shader at all?
... I stick at developping non-shader games .