Personally I consider clipboard managers to be a must-have.
I often need to go back to something I copied 30 minutes ago etc.
Plus they're like a mini browser history, holding your links.
Which one do you use? Or why aren't you using one?
I use https://github.com/madprops/clipton
I'm not using one!
I usually copy something only in the moment and immediately "clear" my clipboard by CTRL + C'ing a single character from some textbox/selectable field :-)
For me, it's not a buffer but just a line of communication between two programs. When I have tried to treat it like the former I have found that mistakes are common and the benefits are very slight.
I use Ditto (https://ditto-cp.sourceforge.io/). It uses about 5MB Ram and lets you expire clips.