I use Linux (CentOS) at work and quite like the PRIMARY clipboard. This adds highlighted text to a clipboard automatically and pastes the contents of that clipboard on center-button mouse click. Importantly, this clipboard does not overwrite the CLIPBOARD clipboard.
I would love to get this functionality on my macOS home machine. I have tried MacPaste, but this overwrites the CLIPBOARD clipboard. Does there exist any utility (graphical or command-line, free or paid) that unlocks this functionality?