In a coop setting you would agree on collective individual responsibilities so everyone has to contribute and spread the burden in a way that doesn't silo people into unequal jobs.

As someone who lived in a condo - the main issues were that because people individually own their flats - I feel there's a distinct line between private and shared ownership, making it easy to disregard communal duties.

Furthermore, because existing residents have little say in who gets to live in their building - you can end up in situations where someone can repeatedly break rules and norms (ie had a person smoke in the elevator for years despite being told not to) and nothing can really be done apart from trying to sue them which isn't an effective way of dealing with problems.

In a coop setting people can democratically discuss and as a last resort even decide to part ways with individuals who won't contribute (from each according to their ability, to each according to their needs obv) since on a hyper-local level everyone is immediately involved with the living conditions of everyone else around them.