In almost all current frameworks. every Actor has a mailbox. It makes very good sense for an Actor programming language not to have mailboxes built into every A

In almost all current frameworks. every Actor has a mailbox. It makes very good sense for an Actor programming language not to have mailboxes built into every Actor because it can make programs less robust, more difficult to understand, and more difficult to optimize. Instead, when desired an Actor can do its own internal queuing as necessary.