I am reminded of the Inmos Transputer.
That, as my older readers may still vaguely remember, was a freak processor in the eighties. It was designed for parallelism: Its fundamental design was for a computer with many transputers, not one with a single humongous blob. Each CPU was small, simple (the wikipedia page includes the complete instruction set) and linked to four other CPUs using bidirectional message-passing connections, and the design allowed vast CPU meshes with message routing and forwarding.
The thing that reminds me of the transputer is the way those links worked. When a Transputer received a message that had to be forwarded, it would prioritise communication over its own computation.
I am reminded of this because my mail is down. A great big failure happened during Christmas vacation. Then a routing mishap left me unable to take part in a video conference this morning. I am forced to prioritise my own programming over message passing, and it feels so good. Yesterday was great.
Tomorrow I shall apologise to borud about my unresponsiveness. But today, I plan to wallow in solitary hacking.
Actually I'll wait a few hours with publishing this. There's a chance someone might see it.