Update Philosophy

[leszek]

You don't plan to update 5.8.4 at all, also not with Plasma 5.8.6? If users want to stay on KDE 5.8.X we should deactivate backport repos and add neon-user-lts instead?

Thats what I wrote. So yes.

Is there also a neon-repository available if users want to install 5.9.1 already?

You can of course add the normal neon user repository which already has 5.9.1.
Though we do not recommend it as you are then basically on your own.