Closed source software from proprietary vendors also have long-standing bugs. You just don't have any easy way to get a list of them. All dev teams (no matter

Closed source software from proprietary vendors also have long-standing bugs. You just don't have any easy way to get a list of them. All dev teams (no matter if they are OS or not) are always shortstaffed. That means bugs needs triaging (prioritizing) and only important (either due to risks of the bug or then number of customers it hits) are fixed swiftly ... On open source you can at least fix it yourself (or pay somebody to fix it for you) if it gets sufficiently annoying..