Can you share something on this reliability? Is it more reliable than the JVM? Or is it more predictable in terms of performance? I’ve found the jvm itself to be rock solid as well.
Erlang/OTP and BEAM have been around a long time and is probably just as mature as the JVM and Java, but they have slightly different goals: very low tail latency, easy error recovery, and easy distributed compute in erlang vs. better customization and median performance for the JVM. I'm sure there's more differences and more nuance than that, but I'd be very happy to use either language/VM in production.
It's also harder to write abjectly wrong code in the BEAM. I found out that my code was effectively self-forkbombing, because I had hooked up an error reporter (I adapted myself because the version I wanted had bitrotted) to rollbar which (very rarely, when the service was in outage) cause a crash, which would try to report, crash, and exponentially grow. Amazingly, this caused no service degradation for our customers.
