KDE is night and day when compared to the GNOME efforts of what represents a full stack development experience, as provided by the commercial desktops and mobile OSes from Apple, Google and Microsoft.
Guys, while KDE is undoubtedly best thing happened to Linux, for me the development... or overall problem of developing software for Linux it he Linux itself: lack of registry, COM, permissions, interoperability. I understand how hard is it to plan and do all these things. But... but.
For example, AFAIR, Kate was integrated as text editor into KDevelop (which I painfully used as main IDE in linux), but it created unbelievable mess in settings - some of them didn't change, others changed things globally for KATE, some worked for KDev. Menus didn't stack up... But still, I really appreciate all the work was done by kdevs! One other IDE I would consider is Code::Blocks, but wx is not entirely good with Qt as backend yet.
Actually D-BUS and DCOP are much better than COM, if Microsoft ever looked into COM like tooling in other platforms, instead they keep rebooting the ATL like experience while ignoring how others have improved upon COM.
XPC and Android Binder are also two other examples of better tooling in this area.
I never dug into D-Bus deeply enough, but as a user, for me it caused one big problem: press PrintScreen for > 1 second, have Spectacle hang itself and take dbus with it, making the whole OS inoperable. Reboot Linux, notice post downvoted by linux fanboys.
Pity that isn't as much loved as it should be.