Do you mean regular clipboard text? You can do that with: ⇧ ⌥ ⌘ V

This is not necessarily supported everywhere though...

Some kind of clipboard manager should be able to munge it that way (Ok, it's 15 years since I wrote clipboard code in "OS X") - a background app and clipboard manager that basically removes style info from the items on the clipboard.

Really wish this was the default, with an option to turn on "paste with formatting". It'd be interesting to see with telemetry how many users choose that.

FWIW, in my many decades of using computers, I've never once wanted to paste with styles as whatever app is getting pasted into inevitably (without exception, like 100% of the time) "guesses" the formatting incorrectly.