Good comment. I will note, though, that there were forms of safer concurrency going way back. PL designers and developers mostly just didn't use them. The main

Good comment. I will note, though, that there were forms of safer concurrency going way back. PL designers and developers mostly just didn't use them. The main exceptions in industry were Ada Ravenscar and Eiffel SCOOP. Concurrent Pascal deserves mention as forerunner.