[developer1]

My only thought is that the airline is going to regret crumbling under the pressure from developers who wanted node.js. Allowing developers to choose whatever language they want for such a massive system is a mistake. node.js has not proven itself beyond being the latest fad. The developers wanted to use something cool and modern, while clearly ignoring concerns over the long-term viability of the system.

Oh well, that isn't a problem for anyone other than the airline. It's possible that in a matter of a few years (instead of decades), the entire system will have to be reimplemented at the airline's cost. You don't use the latest trendy language for systems which are expected to remain in operation for 20-30 years.