This. A hundred times this. The Cat9 stuff alone is so far ahead of what some have thrown millions at cut and paste cookie cutter things like Warp yet that is not even close to what was just presented as a fun thing.
The latest EU funded 'a12' things are also soooo high concept but not fever dream.
I have followed arcan and @letoram/@crazyloglad/... for many many years. It's perpetually one or two approachable explanations away from 'holy shit' this has been in plain sight for how long?!. The character behind is unfortunately a recluse. Jon Postel levels of recluse.
each row is a pipe, each cell is being fed with the data from the cell before and the processed result sent to the cell after. As they reference, there is a full Ph.D thesis on the idea in the shape of 'userland' https://www.youtube.com/watch?v=gla830WPBVU - that describes it better but pipeworld shows how that is not just a PoC but a complete 'full desktop thing' thanks to being built on arcan.