Command-option-shift-V in Safari. A real finger-twister.

You can remap “paste-and-match-style” to command-v globally, thankfully.

Unfortunately if you do so it will break Cmd-V paste on applications that don't have that feature.

cmd-opt-shift-v works on any well-behaved OSX application, not just in Safari.

Not most applications, a handful of applications. The receiving application itself has to implement it as custom logic.

Wouldn’t most applications that support rich text input inherit it from the browser, the underlying framework for native apps and/or be implementing styling themselves already (i.e. code editors)? I’m trying to enumerate applications that I use and I’m struggling to come up with more than Google Sheets, where paste without formatting is a drop-down menu instead.