Pretty sure I read somewhere that Dx7 and 8 aren't even supported on windows 8 anymore, probably wrong, then again why would they support it?

And what makes you think Windows 8 will ever be used on the guy's system

I've had to port code from VS6 to 2005, there were so many issues.

But I agree, if this guy finds that he can do what he needs to for his personal enjoyment using VS6 then so be it.

Besides, the attitude of the OP was that it would be a good idea to be using VC6 (as well as explicitly asking why not to use it). If he had said something on the lines of "I'm still using VC6 and it works for me, despite issues like P0, P1, P2, ... and P<pretty much infinity> compared to a modern tool" then hardly anyone would have had a problem with it. Everyone needs some kind of hobby.
Personally I do not have a problem with that hobby being (figuratively) sleeping in a bath tub full of deadly scorpions (provided care is taken the scorpions don't get injured or can escape to harm nearby innocents). I do object to someone saying sleeping in a bath tub full of deadly scorpions is a good idea and everyone should be doing it.

Lol i would only use it if I had to use it.... Targeting win95 or win32s if oh god some people remember that far... Did vc6 still generate windows 3.1 binaries?

Another reason to use it is if you have to use it. I taught a vb class recently and department told me not to use modern vb.net. Book also used old vb and provided vb working model. So sometimes classes are taught using classic versions of the language.