When it comes to speed, the question is never about pure performance.
If that was the case, we would all be writing assembly. The question is about being fast enough, while allowing you to ship and iterate quickly.
Ruby meets my needs and each year continues to get about 7-10% faster. There is also a push for Ruby “3x3” to make Ruby 3 at least 3 times faster than Ruby 2.
To that end there are really exciting projects like MJIT. There are already alternative implementations with JIT like JRuby and TruffleRuby.
Ruby is fast enough for my needs, and is only getting faster.
So while WEBrick might not be “webscale”, is Ruby? I say yes.
Maybe I shlould stop scanning the articles and read them:))