For example, I have the following answer: https://rpg.stackexchange.com/a/45270/9058. When I wrote the answer, the only official material available was the Basic Rules, so that's obviously where I quoted from. That's not the case anymore, and I could quote from either the Basic Rules or the Player's Handbook, as the text is available in both.
If the supplementing text is available in both the Basic Rules and the Player's Handbook, where should we quote from?--do we care?
Should we proactively edit references from one to the other?