[imtringued]

The actor model doesn't prevent "semantic" deadlocks that are caused by circular dependencies. It's kinda like reference counting which also doesn't handle cycles. In practice it doesn't matter and when it matters you have already saved enough brain cells that you can think about the tricky parts in isolation.

However, memory corruption via manual memory management and deadlocks via manual locking are commonly caused by simple and innocent programming mistakes and basically something one has to live with on a day to day basis.