Command + Shift + 4 not saving image to clipboard

I saw that Command + Shift + 4 gets a regular selection for a save of your screen. When I press the shortcut, I get the rectangular selection, and when I select, I here the camera shutter noise, but then the image is not saved to my clipboard.

When I cmd+v, no image gets pasted, the thing in my clipboard is just what I had previously saved to it.

Command + Shift + 4 saves a file to the desktop, not to the clipboard.

Use Command + Control + Shift + 4 to save to the clipboard.

Take a look at this comment I wrote a few years back for the full list of keyboard shortcuts related to screenshots: https://apple.stackexchange.com/a/204387/60161