Most definitely not. In fact, much of open source is haphazardly developed without regard for backwards compatibility, often also introducing change for no good

Most definitely not. In fact, much of open source is haphazardly developed without regard for backwards compatibility, often also introducing change for no good reason (the word "cleaner" should always raise red flags). Source: a certain developer/admin/netadmin with >30 years of experience using open source software.