It's honestly just Konsole. Kate is very good, you can legitimately use it as a vscode replacement if you want. Dolphin is also the best file manager and it's not even close.
I don't want Kate to be vscode, I want it to be notepad.exe. I want it to open a document instantly and let me edit and save and close with no distractions or delays.
And then kmail... kmail is bad.