I think the motto needs to be more "don`t give up before trying".
Micosoft made some Open Source short time ago, them also promised better interop and stop fighting Free Software. Some exampels
http://www.microsoft.com/opensource/default.mspx
http://research.microsoft.com/os/singularity/
http://blogs.msdn.com/dotnetinterop/
http://www.microsoft.com/resources/s...e/default.mspx
and google for microsoft releasing source code
So imho chances are bigger then 0 % !
I would like DOS 6.22 as GPL so other projects can "copy and paste" from it.