Hi Conrad,
We just switched to DevTalk last year, but I’ll pass along your suggestion. I know there are many people who would at least like to manage errata on Github. All of our books currently use DevTalk for errata, reader forums, reviews, and other interactions with readers. The code for our books is available for download from the Pragmatic Bookshelf website. Just scroll down to the Resources section on that page. Thanks for the suggestion!
Best wishes,
Margaret