Of course, they're very powerful engines. But my goal is to provide true retro graphics, with scanline rendering and raster effects in its core. No other engine can do this because all engines (even the 2D-only ones) try to make use of modern GPU acceleration, that has a very different approach for rendering graphics. Choose what you think it fits more your project.
This thing is about a month old since its first public release
Not the IDE, the project. It's conceivable that someone would use an old IDE (they're comfortable with it, they paid a ton of money for it and can't be bothered to upgrade, etc)
You're right. I use VS2005 because in my daylife job I work mainly with industrial Windows CE 6.0 projects, and Platform Builder is a VS2005-only tool (why, Microsoft?) so I'm somewhat forced to keep using this version. Just as the blacksmith that fixes everything with a hammer because he is proficient using it (despite not being the most suitable tool in all cases), I use VS 2005 for everything :)
There's another reason: any newer VS version can import projects from older versions, but the opposite doesn't hold true. So I'm not leaving anyone out.
This thing is about a month old since its first public release