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.
There were some amazing workarounds to the default discussed her recently. One suggested pasting into the browser url field then copying and pasting out of it.
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.