I've just clicked "Upgrade" on plasma-discover and almost all of Plasma and KDE Apps suite has been silently removed from my PC - including plasma-discover itself. I cannot install it back right now, as some packages require KF dependences in version 5.26, while others are stuck at 5.25. So I'm writing this now on my still running, ephemeral Plasma session. I'm not sure if this is the kind of user experience Plasma Discover should be targeting at ;)