Does it though? How valuable is knowledge of Pascal, perl 5, Flex, or even uncool JS frameworks like Angular 1 these days? You're at the whims of the mob and fa

Does it though? How valuable is knowledge of Pascal, perl 5, Flex, or even uncool JS frameworks like Angular 1 these days? You're at the whims of the mob and fashion just as much as somebody building on a proprietary tool is at the whims of its vendor.