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I agree Erlang is probably not the correct fit for the average startup, but for some areas it is essentially unparalleled (and businesses have had great success with it). Consider the online advertising industry, for instance -- in order to guarantee the kind of uptime and debuggability that real-time bidding and decision making on ads requires, Erlang is an excellent choice (cf. https://www.youtube.com/watch?v=qURhXHbxbDU).



Go is great for RTB as well. Easy concurrency that scales very well. Anecdotally it seems a lot easier to hire for than Erlang/functional languages.


If it's just concurrency and scaling, things are a toss-up. Where Erlang really comes into its own are all the fault tolerant and distributed things that Erlang adds, like the supervision tree.




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