At the very least, it all looks a little childish. "We don't want to support" X is just corporate-speak for "we don't like you anymore and we think you smell funny."

I'm with Grant in that I do not get the sense that the best interests of WordPress users are being served here.

If WordPress.com wants to get rid of old themes, they should get rid of the one I made called Sapphire. When I'm not getting emails about supporting it (I don't), I'm getting emails from people who don't understand the difference between a theme designer and a site owner asking me to remove content.