I believe they did. With the release of the Seattle and Berlin editions, errata was brought back into the the printings. Sixth World Companion has brought in all the optional rules for Metavariants, alternate styles of play, and some good "house rules". And we have the gun book (Firing Squad), cyber book (Body Shop), magic book (Street Wyrd), matrix book (Hack and Slash), rigger book (Double Clutch), and even a critter book (Wild Life) and a book for shapeshifters (Bestial Nature).