Word has nothing like it. Word has a filtered view of codes.

WP laid it all bare. Every code and nuance was presented. Nothing was filtered or interpreted. I recovered many a screwed up document that you would just have to redo in Word if it ever got into such a state.

I still miss a real reveal codes in Word.

There was a public outcry for it back in the day and a snotty response from a Microsoft PM - wish I could remember enough details to see if I could find it but I'm convinced MS never really delivered a true reveal codes purely out of spite.

Word Perfect as I recall actually let you directly manipulate those codes though. Think of it a bit like toggling between an edit view and raw HTML.

Personally, I never liked WordPerfect, nor did I use it much. I used a lot of different word processors but mostly ended up standardizing on Microsoft Word (well pre-Windows) for personal use.