It's funny: I was betting on WPF at the time but it seems dead now, with only some XAML knowledge transferable. Still have to do JS, but at least Angular doesn't suck too much.
Parent comment had to be qualified a bit: Never bet on anything proprietary which doesn't offer significant advantages over non-proprietary competitors.
LOL. I know guys who have worked the last 20 years on Oracle, and they'll have no trouble finding work for 20 more. The same for Visual C++. Or a whole host of other things. The world isn't as simple as GNU ideology would have you believe.
Yeah, like that article from yesterday about the Perl6 guys doubling down because in 18 months when Perl6 was done, the speaking/writing/consulting gravy train was coming...