It depends on your workflow. I sometimes find myself alt-tabbing multiple times to copy stuff over. Othertimes I accidentally overwrite my clipboard and lose some text that I was writing. Being able to recover it from the history is nice.

I use Pasteapp on macOS and FastKeys on Windows, which comes with other useful stuff, such as a shortcut for controlling volume by using the mouse scroll wheel on the right edge of the screen, macros, and a text-expander. The ones I use the most are:

ddate = 2020-02-18 ttime = 03:40:26 nnow = 2020-02-18 03:40:28 @@ = my email