Hello, why old versions are still active and accessible
prevent the audience from sharing between versions
So all players can be collected in one version
When a new version is released, all computers connected to the internet should update automatically to the latest version
There should be no players in old versions

Some 3rd party apps are abandoned and only work with older versions, some people like to drive old versions of tracks. What's the harm?

Let's turn the question around, why not? Like Racon said, what's the harm? So people prefer older versions for their reasons.