how do you even drag-drop instead of opening stuff?
how do you select files?
how do you live?
Saying "well kids use web stuff and Android and dont know what a single click is" is basically neglecting the use of a mouse. I love at least 3 buttons, hovering and fast clicks.
Not in any KDE release I know, and I've been using it since KDE 3.
Tested right this moment: if I press the mouse button down on a video, nothing happens. If I release it keeping the cursor within a ~5 pixel radius, the movie plays. If I move the cursor further than ~5 pixels, it begins a drag-and-drop operation.
Q2: Same way as double-click people. A file only opens if I click, not when I press the mouse button and drag the file around.
Q3: I draw a small selection frame over it, or press the control key when clicking (I have the hand there any, especially if my next input will be Ctrl+C/X and Ctrl+V
Q4: I just do. Sometimes I relax by playing shooters with the "invert mouse" option turned on :D
I have never had a cell phone or smart phone in my life, single-click was the default when I switched to Linux, I gave it a try and I liked it.