-3

To streamline desktop productivity people need to quickly (and every time quicker than before) find GUI controls for certain frequent operations.

Let's consider Firefox for example.
I never use the Home button on it's toolbar. I wouldn't mind if the Home button goes away and the Back button became twice as wide (to make up for the home button). That's because I use the Back button maybe 200 times a day.

The proposal is a system that tracks user menu, toolbar, krunner usage that uses a simple points system.
The logic would be as follows:
All menu items and buttons start with zero points and unpinned.
Every time a button is clicked that button earns 15 points and all other buttons from the same toolbar (or menu) loose 1 point.
If points are positive, they will determine how bright/emphasized (or big) a button will be. If points are negative, the buttons will be dimmer (faded), less bright (or smaller) than the standard zero point buttons.
User can pin any button at any time and the button will stay visible and the points will be reset to zero. While a button is pinned points will not be added or deducted from it.

When a button goes down to (-5) points the button will hide and an indicator on that toolbar will represent the action to briefly unhide the hidden buttons (or menu items).

Numbers 15, 1 and -5 should be adjustable by the user.
Brightness, dimness, enlargement, shrinking, color tones, hidden buttons indicator, are all up to the theme designer to decide how to represent them.

KDE developer should store the points for each user in the computer.