> please use the IETF Datatracker URL.

On my phone, your Datatracker link results in an unreadable mess of a page due to the hard-coded line breaks in the plaintext rendition of the RFC text (making it unreadable in portrait mode) and the huge sticky page nav (causing the content viewport to shrink vertically to almost zero in landscape mode). The HTML page behind OP's link reads just fine.

> The best way to view an RFC, IMHO, is to use the "htmlized" format

I don't see any choices of format such as HTML behind your link. There's a sticky nav, then a couple of pages of metadata, followed by a plaintext rendering of the RFC. What am I missing?