In theory, I would love to use KDE and use Gnome only with many plugins and tweaks (like IMHO the majority of Gnome users out there, see Ubuntu desktop).
In practice, KDE has still too many unsolved problems:
For years now, I try KDE from stable mainstream distros in standard VMs, always something from the vanilla KDE setup segfaults within the first 30min w/o me even starting to customize it. It seems this is not only a personal anecdote, but the experience of a lot of people trying KDE. (Gnome in these VMs runs stable w/o any segfaults, these VMs sometimes are running for days)
KMail ... even the KDE community themselves point out all the trouble with KMail: It works, until it doesn't, no support for GMail OOTB, etc ... This problems with KMail are known/reported/experienced for years now, w/o being fixed. Thunderbird/Evolution work OOTB and stable for my needs since a decade by now
Online-Accounts for Gnome works on every distribution OOTB for me, for all my professional/private needs. Again, in theory Dolphin is a much better file manager than Nautilus, in practice I can remote mount everything in Nautilus
In summary: I am not a big fan of Gnomes UI and would much prefer KDE, but in practice Gnome works stable, lets me setup my online accounts/connectivity and email and simply works. The KDE community ignored too many of this issues for too long (stability) and is still ignoring the widely known issues with KMail (fix it, dump it or at least communicate it is not ready for general use). I lost trust that these issues will ever be fixed by now. (Was a happy KDE 3.X user back in the day.)
I know you mean good, but exactly this is the problem: Fix known issues with KMail or with KMails backend? - Nope. Write a new E-Mail client which someday, in the far future might work and have all the features we need? Let's go!
IMHO Evolution had the benefit, that it initially was written by Ximian and brought up to be good enough(TM). Honestly, I don't see anyone investing this time, money and energy in a new KDE email client (or in KMail).
In theory, I would love to use KDE and use Gnome only with many plugins and tweaks (like IMHO the majority of Gnome users out there, see Ubuntu desktop).
In practice, KDE has still too many unsolved problems:
In summary: I am not a big fan of Gnomes UI and would much prefer KDE, but in practice Gnome works stable, lets me setup my online accounts/connectivity and email and simply works. The KDE community ignored too many of this issues for too long (stability) and is still ignoring the widely known issues with KMail (fix it, dump it or at least communicate it is not ready for general use). I lost trust that these issues will ever be fixed by now. (Was a happy KDE 3.X user back in the day.)
Merkuro Mail might fix some of KMail's issues. It still uses the same backend though, and isn't really stable yet.
I know you mean good, but exactly this is the problem: Fix known issues with KMail or with KMails backend? - Nope. Write a new E-Mail client which someday, in the far future might work and have all the features we need? Let's go!
IMHO Evolution had the benefit, that it initially was written by Ximian and brought up to be good enough(TM). Honestly, I don't see anyone investing this time, money and energy in a new KDE email client (or in KMail).