Yeah as I alluded to, libraries are the thing that hamper this style. You don't control all the code in your application. But it's not too hard to work around

Yeah as I alluded to, libraries are the thing that hamper this style. You don't control all the code in your application. But it's not too hard to work around. I also think language-supported thread locals are superfluous in this style. Instead, just create a single object that runs into a single thread. Then you don't pass the object to any other threads. The members are automatically thread locals. If you have N threads, then you have N objects confined to those threads. There doesn't need to be a separate concept of thread-local IMO.