Oh come on now, give the guy some credit. It's a miracle that anyone is even developing software for the MegaDrive these days. I think it's an amazing feat in light of the fact the this system is so old that you can't even find the tools and documentation on how to program it anymore.
There's quite an active homebrew scene for the Megadrive/Genesis, but yeah the docs and tools available aren't anything compared to other retro machines.
This is a good resource:
http://gendev.spritesmind.net/page-doc.html
