Go, Rust is apparently getting there since it just smoked Go on a pretty core multitasking-heavy task here, and a lot of the old "stodgy" languages like Java while none of the cool kids were looking have gotten pretty good at large numbers of threads too.
I'm also expecting some sort of sensible solution to this sort of concurrency challenge to simply be baseline expected functionality for the next generation of languages. Anyone sitting down in 2020 to write The Next Big Language who ignores the fact that by the time they're done, their CPUs are going to be 64-core and the GPUs will be several-hundred-thousand core is really going to be missing the boat.
I actually encourage Erlang partisans to consider this a win in the general sense. Quite serious. If you consider languages as a multi-decade conversation, almost everything Erlang "said" in the late 1990s and early 2000s is in fact proving out to be true. However, while Erlang was a trailblazer, it isn't going to be that Next Big Language, nor anything like it. It got a lot of things right, but it's got too much wrong to be the NBL, and even if you did the minimal fixes, the result wouldn't be backwards compatible with Erlang anymore so it'd be a new language.
A lot of Erlang partisans are making the error of thinking the next language needs to be just like Erlang, except perhaps more so. But that's not how progress gets made. The good ideas are ripped out at a much more granular level and recombined with all sorts of other ideas and the end result may be quite different than what you expect. Go, for instance, can very much be seen as a direct sequel to Erlang among other things, even though it may not seem to have "OTP" or "built-in multinode concurrency" or whatever other apparent bullet-list features Erlang has, because a lot of those bullet-list features are really just epiphenomena of the real underlying features. Rust has its own nods to Erlang too; the whole "ownership" thing comes from the experiences with both mutation and immutability in a threading environment. But rather than making "Erlang, but a bit moreso", you get something that takes the lessons, ponders on them for another 15 years, and produces something different. It isn't Erlang, because at the time that Erlang was being written (Joe Armstrong RIP), nobody had the experience to think of Rust and imagine it could make a practical language. (Nor am I entirely sure the computers of the time could have compiled it; even if we sat through the clock time I'm not sure Rust could be stuffed into a 1997 desktop computer's RAM.)