> and I use xclip extensively to copy contents of files (and stdin) to it. I won't say anything against your other points (and in fact I am typing this comment

> and I use xclip extensively to copy contents of files (and stdin) to it. I won't say anything against your other points (and in fact I am typing this comment on Xorg because I have my own list of reasons), but https://github.com/bugaevc/wl-clipboard https://github.com/bugaevc/wl-clipboard is almost drop-in for xclip/xsel.