Came here to say this. "Modern" C++ with move semantics may still be fairly verbose in some cases, but claiming that you need to manually care about memory management (i.e. call new/delete/malloc/free) is a bit weird. It becomes especially weird when the post somehow implies that “paying client[s]” have arbitrary amounts of CPU time and memory available and that you can hence squander their resources as you please.

Having said that, I can easily agree with the remainder of the post that the existing languages/ecosystems aren’t alternatives, and that statement does not change if you correct Scala’s “great performance” to “mediocre performance”.