I thought it looked familiar 
Desktop styled to fit better with Sweet Candy SDDM theme.
Bottom panels are Latte Docks with Intli-Hide, the sidebar is Windows Can Cover. ('Cause Windows Always Cover option has some bugs )
I just found out about the oxygen application style and I love it so much.
I just wish there was a neumorphic theme to go along with it, but breeze is good too.
Now that I have discovered the setting that allows me to have a Window in Full Screen, and navigate to other workspaces, I can run my Konsole window in full screen on 1 workspace, and navigate to other work spaces, and open another Konsole window as a normal window should I wish.
This improves my work flow, because I can also do this with a Virtual Machine Window.
I use the desktop very simple, I put this bottom bar to hide itself. I use a lot of keyboard and prefer a clean look.
neofetch is a nice tool like inxi, to have a short summary of the system 
I love such like you can see on my desktop on the top right side, I have also some other “watch” scripts like Disk Free Colorored, which shows the used disk space and change the color from green < 80%, yellow between 80% … 90% and red > 90%.
In your screenshot I really like the idea of the task bar entries having close buttons - is this a special plasmoid or how is it done? Would like to try that out!
I wrote a little howto with toggling the right control button in KDE. It uses xdotool.
here i spent the last weekend making a gtk3 GUI basically with only gtk3 headers and recently adding stdio stdlib(sp?) for easier path handling (hardcoding)
but take a look all the icons are kde to help me learn kde better/faster/funner
Untitled on Tumblr - #fun with gtk3. and so much of it!!!
wrong link use this: Untitled on Tumblr
What do you use for your visualizer?
The visualizer? Cava. Unless you’re talking 'bout the one on the desktop in one of the screenshots. That is ( was ) Panon. Last time I checked it doesn’t work anymore.
The day lightly will be no longer supported, which wouldn’t surprise me one bit, I’ll probably quit kde alltogether and go openbox only. Given the fact that a bunch of things already are no longer available and third party developers are, understandably, reluctant to put in more effort, I wouldn’t be surprised at all.
Can I ask you more information on the themes you used? That looks great!
Looks like the Mojave kvantum theme.
I genuinely like this look. Nostalgia is also talking but also the skeuomorphism helps distinct elements so well!
I know most people prefer the modern KDE design but I’d love it if there would someday be a way (as an option) to go back to older KDE themes like this.