They have to keep upping the version numbers. Windows is up to version 11, if they’d stayed at 5, KDE wouldn’t even be half as good as Windows. 
I don’t think KDE deserves all the negativity that is being heaped upon on it personally. I’m typing this on a Samsung Android phone bought new only a few months ago. The hardware and software is produced by two of the largest technology companies in the world. The experience should be flawless, but for the last several weeks I have to wait about ten seconds for what I’ve typed to fully appear on my screen. Talk about lag, it’s painfully slow, and this is on a top of the line pricy piece of brand new technology.
Most people are running KDE on hardware that is likely 5 or more years old, and KDE is a fully gratis OS with no cost to the user. For the money, KDE beats the hell out of my cell phone in my book, (screen cracked already).
Given the choice of which performs better between my new pricy Samsung Android phone and my 3 year old computer running KDE, KDE is easily the winner. I’m sure they’ll get the glitches worked out soon enough on my phone (as they should), because they are produced by billion dollar technology companies. KDE is insignificant in comparison to Samsung and Google, so you need to cut KDE some slack IMO.
KDE beats the hell out of Windows, or any other Linux desktop IMO, so I can live with any bugs until they get them ironed out. I couldn’t imagine what I would do if the KDE project folded, I couldn’t possibly ever go back to Windows. So think long and hard before badmouthing KDE, because the alternatives are far worse IMO.