The grateful dead were definitely my introduction to flow state. It wasn't just programming, it was using a MUD in the late 1980s. In my case, the Dark Star from Live/Dead (a long, extended jam that explores the outer reaches), I like a subset of the dead and phish for flow state programming but like the author find that modern work requires too many distractions to enter and stay in the flow state for a long time. In my case, large portions of the dead and phish don't work for me at all- the worst is when Phish is doing a great job and then suddenly they sort of lose the groove, or when they get stuck in repetitive loops.