I don't have empirical evidence (nor experience) to hand, but I doubt there's any shortage of individual systems that do some sort of parallel/concurrent work

I don't have empirical evidence (nor experience) to hand, but I doubt there's any shortage of individual systems that do some sort of parallel/concurrent work faster than Erlang systems, built on lower-level concurrency primitives offered on the JVM, in golang, Rust etc. More narrowly though, there is a candidate for a means of building systems from higher level, BEAM-like primitives with potential for greater performance than Erlang/Elixir - Lunatic (https://lunatic.solutions/ https://lunatic.solutions/). It is admittedly a kind of reimplementation of the BEAM, which maybe makes Virding's point. But it's not ad hoc.