I'm not too concerned about older systems... tech older than 2003.
If the card supports Shader Model 2 (SM2) then you know the standards are pretty good and most of the OpenGL extensions you are targetting should be very likely available.
My thinking on the ATI side for example is that anything 9700 and up should be more than sufficient.
I know the engine can run on very old hardware, bit I don't see much point writing code today (2010) to stress about tech thats probably not used much AND you don't know for sure if your code works.
bottom-line: less bugs, less bloat.
If the card supports Shader Model 2 (SM2) then you know the standards are pretty good and most of the OpenGL extensions you are targetting should be very likely available.
My thinking on the ATI side for example is that anything 9700 and up should be more than sufficient.
I know the engine can run on very old hardware, bit I don't see much point writing code today (2010) to stress about tech thats probably not used much AND you don't know for sure if your code works.
bottom-line: less bugs, less bloat.
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