I use both, but I admit it's a bit idiosyncratic. When immediately pasting after copying, the primary X buffer is obviously superior as it requires fewer actio

I use both, but I admit it's a bit idiosyncratic. When immediately pasting after copying, the primary X buffer is obviously superior as it requires fewer actions, and only one hand. However, if I'm selecting something to keep in the buffer for a bit before pasting, I'd often screw myself by overwriting the buffer via random clicks in between. Now I'm in the habit of using primary in the cases when I know I already have an input field or prompt ready and waiting, and the very next thing I'm going to do is paste. When there are steps left to be performed after copy but before paste, I use the clipboard. I know it sounds overcomplicated and perhaps insane, but it's actually totally automatic at this point, and doesn't feel like it costs any mental cycles at all. For the first case, either I just readied the other program for input within the last few seconds, or at least it's visibly waiting for input on my screen. If not, then Ctrl+C it is.