Yes, I know that sooner or later I will have to du.
But this is a production box, not one for experiments. I came to siduction down the way back from kanotix in order to use the latest cutting-edge software on my desktop, not to have fun fiddling with my machine.
Today I way more than halved the number of packages pending, but of course I'm not going to wreak havoc manually (then I would be stupid). When I think KDE5 is enough stable and functional for my production needs, I'll du and shift.
And, btw, GCC hell has not ended yet too, so also waiting for that to settle down.
Anyway, reverting back to main thread topic, no more freezes since today's partial upgrade.