If the rights-holders for 3.9 did the same thing
There is no "rights-holder" for 3.9. H&P used to be be the rights holder, but their license from AInc was revoked ages ago (and would have expired by now anyway). Now Cloanto and Hyperion have rights to AmigaOS <=3.1, H&P owns the documentation, the new installer and a bunch of prefs programs (re)written for 3.9 while all other improvements and additions are owned by the external authors who wrote them.