match Nvidia's support length (10 years)
You can still get drivers from AMD for the HD2000 line, which came out in 2007 just after AMD bought ATI (and was still sold as ATI). Of course, they've not updated that driver for years, but what are you expecting? It's not like nVidia are providing fixes specifically for Geforce 8000 series cards either.
Biting the hand that feeds IT
