Aren’t coops basically democratic condos? In Sweden we have “bostadsrätt” which are condos governed by a democratic resident association. They’re good for democratic control over housing, but they still require a mortgage and they’re still subject to market speculation. Some of the apartments can be rentals, but that still means you have a landlord, just that your landlord is your neighbors.
Having the city or the state as your landlord seems like it would be more ideal, or at least a balance of coops and public housing.
For the U.S. at least:
With condos, there’s a condo association that owns all the common areas. Then the association itself is owned by the owners of the units, and the management is elected by the owners.
With co-ops, the unit owners directly own the common areas in common, and the management is also elected by the owners.
Functionally speaking they’re very similar, and co-ops tend to exist in places where this legal structure predates the invention of homeowner associations (basically New York).