I think the most interesting thing about Jack Dorsey's "Slack killer" is the idea around shared compute.
I haven't seen people talk about it so here are my thoughts FWIW:
Open models got good, close enough to the paid frontier stuff to run for real. But the strongest ones need expensive hardware most people probably won't buy alone, and it's kinda a pain to set up if you aren't technical.
Shared compute solves exactly that. In Buzz, one person runs the machine, loads up an open model like Google Gemma, a