By conceptually separating synchronization from mutual exclusion and abstracting concurrency into separate models (atoms, agents, refs) that correspond to separ

By conceptually separating synchronization from mutual exclusion and abstracting concurrency into separate models (atoms, agents, refs) that correspond to separate use cases (synchronous and independent mutable access across threads, asynchronous and independent access, and synchronous and coordinated access). It's higher level than using message passing for all types of concurrency and, therefore, more expressive. When the goal of concurrency is parallelization, I'd want the most abstract and powerful tool for the job, which for me means Clojure over Erlang. When the goal of concurrency is reliability, I imagine I'd want separate lightweight processes for fault tolerance, which is where Erlang seems to excel.