I'm a huge fan of psilocybin. I've taken it over 100 times.
And your article is a great read. I never had any experience microdosing (smallest dose was about 2.5 grams). I usually would start off at 4-5 at least, and I had plenty of 7 gram doses. Only once I took 14 grams, and that night was so insane, lol.
The flow state thing you mentioned I totally agree with. I'm a guitarist, and psychedelics would most certainly bring on flow states, and almost every time I used them. I would get into the best flow states after I came down off my peak. I wrote so much amazing music those nights.
But I only dose about once every year or 2 anymore.