I don't mean to be completely negativist, but I also don't think that I'm alone with this viewpoint. Ever since the decision was made to move to a wiki format from the old "User's Guide", "Tutorial" and "Language Reference", I've found it almost impossible to find useful information on a topic without knowing some deep-ish link to it first.
Case in point: I just downloaded and installed the latest Xojo IDE and wanted to do some reading about what it would take to support "Dark Mode" in my cross-platform desktop application. From the Help menu I chose "User Guide", and then typed "Dark Mode" into the Search field. Nothing useful. OK. How about "Supports Dark Mode" (after all that's the caption beside the switch)? Still nothing. Search the "Release Notes" for "dark mode". Oh look, there's mention of an "AppearanceChanged" event. I assume that it's in the Application. Type *that* in. "Sorry your search did not return any results." What about "SupportsDarkMode" all one word, no spaces, just like the release notes say. "Sorry your search did not return any results". WTF.
This is ridiculous. I shouldn't have to spend more than (at most) 10 seconds to find at least *some* vestige of useful information about some feature that I'm sure took many, many, many, programmer hours to implement. After almost 10 minutes I've given up and decide to write this tirade instead. Did it help me find better information, No. But I feel better.
DarkMode certainly isn't the feature or concept that isn't easy to find in the new documentation. Pick pretty much any significant programming abstraction and I defy you to easily find a *truly useful* writeup from the "Search" field. I keep the old RB pdf documents around and still refer to them to this day because the new system is so broken. Change my mind.