It still has some vestigial ones left, though most of them are buried under File > Options > Display now. (The most common one to show/hide Paragraph Marks/Pilcrows ¶ is also for now still on the Ribbon under Home > Paragraph [Alt+H8].)

The Word argument is that its underlying model was always "stylesheet-based" more than "RTF escape code based" like Word Perfect was so relying on "Reveal Codes workflows" was an impedance mismatch and that you should really learn its Formatting Styles system (which is also why the Styles Gallery is the biggest section of the Home Ribbon since the invention of the Ribbon).

Yes, around the Word 6 era. It also had a plain-blue-screen mode for the real WP diehards.

> Didn't MS Word have Reveal Codes ?

It has some. Getting rid of page breaks in the new Office versions is ... interesting, to say the least.