macOS: screenshot via keyboard shortcuts

Since the introduction of universal clipboard I heavily use:

Capture a selection to the Clipboard:

Shift-Control-Command-4

Shift-Command-3	Capture the screen to a file
Shift-Control-Command-3	Capture the screen to the Clipboard
Shift-Command-4	Capture a selection to a file
Shift-Control-Command-4	Capture a selection to the Clipboard

Official keyboard shortcuts:
http://support.apple.com/kb/ht1343

And how to change the file format from png to jpg:

http://osxdaily.com/2006/12/08/taking-screenshots-in-mac-os-x-and-changing-the-default-filetype-from-png-to-whatever/

shortcut, screenshot, hint, macOS

Why does blogger not support search of Labels??
Why does blogger not update an blog post date if updated??
Why does blogger not just die off instead of being there with no love, i.e. no state of the art feature updates.