I hate to rain on your parade but Powell’s isn’t exactly thriving. There were layoffs about 5 years ago and they’ve scrapped big renovation projects and even plans to move the main store because of revenue problems.
I think this is a very important point; independent bookstores in general aren't "thriving" in the normal Wall St sense of the word. I wonder: is their whole resilience is due to more of a downshift in expectations? I.e., earn enough to make a living but not to expand? To give your employees a liveable wage but no healthcare?