I tried the KDE version coming with 11.1 when it came out. After a few updates it wasn’t a catastrophy over all. But still, up to the current point kde 3.5 is better.
What is true, the very same KDE.org up to 4.3 did state it was only for “risk loving folks” and that conservative users were adviced to stick to 3.5.
When openSUSE did choose the 4.0 push, it happened that they at the time where trying to get the distribution as a whole to be Gnome based. Honit soit qui mal y pense. But to integrate an immature KDE was IMHO not so “unfitting” in this strategy.
I think the “religious war” about Gnome, KDE 3 or 4 is pointless. Wenn 4.4 or 4.5 will be out, it will simply come normal to use it. And users should install what they like best. You have installed KDE4 and you do not like it? Use Yast…and the mouse. For heaven sake, one of the biggest advantages is that you can install a base system with multiple desktop environment and you can choose the session you want to use.
There have been some voices saying: is this for productive use…or for play?
Well, if one wants a professional productive solution in my view he has two choices: one is to get a bit more conservative. At least 50% (but probably more) of the people crying misery on KDE 4.x did update although there was no hurry, no necessity and no indication. The were horny to see new stuff and viced because for years now every new version was more bullet proof. If you do, if you “violently update”, you do bear the consequences.
The other choice would be to buy a “conservative product” of novel like SLED. You pay and you have professional assistance.
You here a lot of people complaining about stability. Honestly I have the impression that the stability experience is much due to hardware. You can get the “die harder” so you use ATI. You can get the “s.u.c.k.s. sometimes during kernel upgrades” that is you are using latest Nivida graphic cards. You may have luck and graphic is not so important (as me with a GM intel based laptop) and you have nearly no trouble.
Also here: people have more instability and trouble if the have the “updatitis”.
Maybe, if you have a system that you are getting used to and it works…you just do not update it at all (but the security updates of course). You will see that when you come to a point when the current option will not suffice anymore, quite some time went by and you will have gathered the necessary experience to carry on with a major update.
Personally, as for now I am still using KDE3.5 and 11.1 (and when I installed it, it was quite buggy and unstable and now I feel cosy and comfortable, learned to live with the very few “won’t fix” bugs and do not dream to update up to the end of life). If it wouldn’t be my productive system I would try out the latest and greates and do bug reporting, but that only given I have a second machine for working. I cannot even claim the current developments I do not like them, the are interesting, althouth they are indicating clearly that the conventional desktop KDE4 will be only for the now fashionable bit 19-23" monitors and the laptops will be “forced” to use what now is a technology preview: a special net/notebook desktop.
What does KDE3.5 and KDE 4.3 have that the other desktop environments do not have? A lot of geniality, originality and good will and a huge number of innovations :-). Just to refrase your question.
**Use what you like, but if you have done your choice do not wine about what is an obvious consequence of your choices. **I guess that is the essence.