[edtechdev]

For what it's worth, .NET had those same issues 10 years ago when I left it (for java, then in 2008/9 for javascript/html5). From an educational software perspective, the lack of an equivalent to java applets (I know, they suck, but back then there wasn't a better alternative), and a lack of cross-platform browser support was a problem. And without Microsoft support or assurances, the Mono project, while they did incredible work, divided the Linux world because of a fear of Microsoft's patent lawyers.