> I wonder what Linux exclusive software they are hoping to support.
It would be more of a case of how well certain software works, or how well that software works together, than one of supporting Linux exclusive software. There have been a variety of ways to run Unix software under Windows for decades. Quite often, there are quirks to deal with unless considerable effort has also been put into the Windows native version. I doubt that WSL will actually appeal to many existing Linux users, but it will probably prevent the slow flow of people from Windows to Linux.
I agree that native ext4 support would be more useful for people who dual boot.
It would be more of a case of how well certain software works, or how well that software works together, than one of supporting Linux exclusive software. There have been a variety of ways to run Unix software under Windows for decades. Quite often, there are quirks to deal with unless considerable effort has also been put into the Windows native version. I doubt that WSL will actually appeal to many existing Linux users, but it will probably prevent the slow flow of people from Windows to Linux.
I agree that native ext4 support would be more useful for people who dual boot.