Just because XP is "supported" by the Windows team (even if in a security-fix only state), it doesn't follow that the developer division should necessarily continue to produce newer tools for it, it is fundamentally a dead platform, the tools needed already exist and nothing is going to change that.

Most of the major PC manufacturers have had 2012 as the last year they expected to produce XP-compatible hardware for several years now, I don't see that changing either. As with every release of Windows, attempting to continue using it right to the end of it's product lifecycle becomes an expensive and inconvenient option, the world moves on and it's best to strategically plan not to end up in that situation.