Comment by tatersolid

Coming from the banking industry, nobody looks at using unproven languages or frameworks unsupported by a large community or major vendor. If you "guess wrong" on a language you're looking at a multi-million dollar rewrite down the road which is an unacceptable risk. It's also very difficult to find staff or contractors who are familiar with new or unpopular tech. Basically any industry that deals with "real money" or "life and death" intentionally does not follow developer fads.