Dell Inspiron M5030 - unsupported to upgrade to Windows 8?

Hi,

Is there any particular reason why Dell does not support upgrade for this laptop? See:  http://support.dell.com/support/topics/global.aspx/support/kcs/document?docid=575111#Inspiron-Laptop

I only bought it last year in July, so it is very disappointing to see that Dell does not support upgrade for it from Windows 7 to Windows 8. I got halfway through the Windows 8 installation, the two things I needed to uninstall it said were "Dell Touchpad" and "Dell Stage" but obviously did not proceed to uninstall those two after seeing the above page.

Thanks.