Thanks for this interesting post.

Intuitively, relational algebra compresses enumeration over data in time that a CPU executing billions of cycles a second can feasibly and efficiently traverse and execute against many collections of millions or billions of records in human perceivable time thanks to indexes.

I've been trying to think of systems communicating with eachother as parts of a relational model in the sense we can model system behaviour as a series of events and a join is a communication between components.

I would love to talk about this with people.