These days it seems like much of a language's benefit to developers comes from its libraries rather than from the elegance of its syntax or the ease of implemen

These days it seems like much of a language's benefit to developers comes from its libraries rather than from the elegance of its syntax or the ease of implementing an algorithm. The big question is, how much of the "standard" libraries are supported on these devices? I remember writing a C# application using Winforms back mid-last-decade and assuming that portability would be a cinch...right up until I realized that Winforms weren't supported by Mono yet and I was supposed to use Glade# or some such nonsense. C#'s mindshare mostly comes from Windows GUI developers, and telling these folks that they can use their pet language only if they relearn all the libraries isn't going to be much of a win, I don't think.