As someone who writes in C++ and uses coroutines everyday for work, I find for our use case this is actually helpful. We use seastar.io a thread per core frame

As someone who writes in C++ and uses coroutines everyday for work, I find for our use case this is actually helpful. We use seastar.io a thread per core framework and locks are "async" friendly in that they yield for access instead of blocking. Also embracing fully async message passing between threads simplifies the programming model a ton.