Based on what I've seen, codebases, that use non-mainstream languages and technologies have a tendency to fracture into parts written in a mix of languages and

Based on what I've seen, codebases, that use non-mainstream languages and technologies have a tendency to fracture into parts written in a mix of languages and disappear in the rubble. So let's wait a few years, and see, shall we? (It's not that I don't like, or don't use shiny 'new' toys. It's just that in the long run it really really helps to use these toys only in the 'research grade' code. Depending on anything even a tiny bit out of industry mainstream in your key production code is a huge liability few years down the line.)