That might be true, but I'm more interested in reasons behind it. Surely it isn't something like "well, this seems like high quality, therefore I will not use it".
almost nobody is using erlang. one of the best languages out there.
Actually, that's a myth.
One of the reasons why Betamax lost is because a tape could only contain one hour of film, so you needed at least two tapes for a single movie. VHS didn't have this limitation.