Preview.app in NeXTstep used to have a postscript window where you could type in postscript (or paste it in) and interactively work with it. It was an essential development tool to help write postscript before including it in a source code file as a pswrap.

I didn't know that! Is it announced somewhere, even buried deep in release notes, or just one of those things that they decided silently to enshittify?