Old-Polack - As you say, KDE-4 might have come a long way - but it also has a very long way to go....
And I wish it a safe and happy journey while going there - ASAP.....

Re "all of that eye-candy stuff" - it'd be nice if there was a CC option - or maybe a "Plain STD Linux KDE" install option, just to can the lot, and leave Users who want a "conventional" set of Desktops with "usual" Menus, to work with.
I do realise that to attract new younger Users to Linux, they might like a Desktop setup that behaves like an "exciting" Computer-Game with Whizzbangs, Sparklies, and Unpredictables, to play with... What might suit a lot of folk a few years into Linux - is if that could all be turned off...
Of course, I must be a boring-old-lot - as I just want a half-dozen or so "working Desktops" - that stay where they're put - don't turn into other "Views" or "UFOs" - and have any icons put on the Desktop - remain where put. I don't spend most of my day doing "Advanced Linux Configurations" - or trying to find out just how many Peculiar Floating and Wandering Sort-of-Desktops the KDE-4 Circus can be configured into...
As for the Hysterical and Unpredictable appearances and disappearances of Dolphin - heh! It pops up from the right end of Panel - to announce it's going to do something - try to click to get it to do anything - and it vanishes. So then you try to click it up from the left end of Panel - and it offers several choices - most of which it can't do... Finally you get it open - then find you can't Drag-Drop or Copy what used to be Files and Directories by left-clicking on the icon.. No, you have to hover over it until the text shows under it - then left-drag or click ONLY on the text...
It's rather like the "drag on the text-name" improvement for DOS-3.x in the 1980s...
Ohh - the problems are with Nvidia Cards, too - not just the Audio and Audacity - in HDD installs...? No 3D functions in KDE-4.... Wonderful - glad I'll be hanging on to KDE-3 in the other box, then...
Which leads to another graphics thing - in V-Box KDE-4s (2 of them) - I've put in the new Kdenlive video-editor.... Not really expecting that to work well in a virtual install - just for a look at it. Is it "that" flaky-unstable" in the HDD installs, too?
Does Digikam work properly in an HDD KDE-4 install?
If not - might KDE-4 some day be able to run Raw-Therapee - said on the Camera Forums to be the best Linux RAW post-processor...?
At present I'm running Windows Raw-therapee in Wine - but as Wine isn't really suited to KDE-4 - it might not do that...
Needing to have another HDD install (perhaps in the other box) - of the Distro with name like "Bye-Baby-Bunting" - just to get an in-Linux HDD version of Raw-Therapee - would be a distinct pain....

Maybe, one day, we - this Linux Forum, and others - can one day get back to mostly discussing Linux, its apps, tools and etcs - rather than being a Medicare-Outstation for KDE-4....
And with all then being so much happier - Fun and Ravings might return to SandBox...

Regards, Dave.