As an aside, these are details I rarely see mentioned in other tutorials—the “gotchas” and other problems that you might encounter. I feel like they are helpful inclusions but can be a bit of a bore.

Not a bore at all, it's the main reason I read this series. Anyone can click around a WYSIWYG editor, I'm here for the hangups and workarounds I'd otherwise only glean after dozens of hours trying to nail a specific client. Moreso with how fast GB keeps iterating.