One of the most valuable sections of the PDF is the deep dive into Tailoring. The 7th Edition acknowledges that "one size fits all" does not apply to projects. It provides guidance on how to select and adjust methods to fit the unique context of a project, which is a critical skill for modern PMs.
A new section provides a library of tools (like the Tuckman Ladder or Monte Carlo simulation) that project managers can pull from depending on their needs. PMIstandards+™: Pmbok-R- Guide 7th Edition Pdf