jacob wrote: What fraction of those attempting permaculture actually manage to feed themselves 100% (or lets just say consistently at 90%+ to avoid gotcha-arguments) of their calories from their own garden?
Well, according to the Wheaton Eco-Scale, growing 90% of your own food is Level 5, and about 100,000 humans would be at that level, and Level 3 where you just have an organic garden and mostly buy organic at the store would be 10 million humans, and Level 4 (1 million humans)you are growing around 40% of your own food and studying permaculture. So, the fraction would be somewhere between 1/100 and 1/10.
It's also the case that not everybody who is into permaculture is dead focused on food self-sufficiency as a metric. For example, Eric Toensmeier, author of "Paradise Lot: Two Plant Geeks, One-Tenth of an Acre, and the Making of an Edible Garden Oasis in the City" and "Edible Forest Gardens" was striving for plant diversity rather than food self-sufficiency with his "Paradise Garden" project. However, one interesting thing that happened with that project, which I have also observed, is that the productivity of the not-ideal-in-many-ways tenth acre improved a great deal and in unexpected ways when the diversity of the humans contributing to the project went up after he and his co-author/project-partner Jonathan Bates acquired female partners. Similarly, my second permaculture project on northern near-dune forestland was only aimed at food self-sufficiency at around one level beyond the human-functioning-like-a-bear level; mostly I ate stuff like pancakes and coffee cooked over open fire while at that site, with not infrequent trips to town with my partner to eat at the diner with lots of taxidermy on the walls.
In terms of my other two permaculture fails, I would say the core reason they failed was that I was ridiculously over-optimistic about my ability to also include free or extremely cheap shelter in my permaculture design. IOW, I was attempting to make my permaculture project cover majority of my possible expenses, not just my usually quite low otherwise food expenses. IOW, you could say my fails were largely due to attempting to succeed at FIRE and Permaculture simultaneously with less than $10,000 total investment in either project. However, you must admit that it would have been
quite the coup if I had managed to pull it off.

(I know, I know, Tortoise and the Hare...blah, blah, blah.)
Anyways, focus on aesthetics was not the problem. I am fairly certain that if I had $100,000 to invest in another independently owned permaculture project, and I was returned to the state of health I enjoyed 6 years ago, and I situated the project in a location with fairly relaxed code/regulations, 90% feeding and sheltering myself on the site of the project could be accomplished. However, I am far from a purist in any of my pursuits, so I almost certainly would be buying some foodstuffs I wasn't/couldn't produce myself and also taking the occasional trip to the diner or fancy restaurant in the city after an evening of pure sensual aesthetic enjoyment of a musical theater production.