Even when I was living in a very liberal area, there were only a small handful of stores that advertised as worker co-ops. It’s funny too because those co-op stores were all incredibly popular and successful, so I don’t understand why they are so comparatively rare? The organizational structure seems simple to maintain, and has a high incentive for regular workers to go above and beyond since they directly benefit from the business being successful, so what’s the deal? I am speaking from a US centric view, so maybe things are different in Europe, but even with my limited knowledge I feel like they are relatively unpopular there too, but maybe not? I dunno.
The most efficient organizations are the least free. Consider the army for example. Probably nobody knows how to organize and execute large projects faster, yet each member is essentially enslaved until his contracted service term is up.