Parmandur
Book-Friend, he/him
What the word "Edition" usually entails is not remotely obscure or arcane: anytime a book is changed enough where a new ISBN is issued, that is an edition. There have been 8 PHBs and DMGs so far by ISBN, hence 8 editions (the Monstrous Compendium and Monatrous Manual make this somewhat more mbiguous, bit only somewhat).You have yet to show anything at all that shows that they are changing things due to the very obscure standard publishing industry usage. I've seen nothing at all to indicate that's true.
I already linked where WotC talked about how they avenging to talk about the rules as anything other than D&D when they come out, and...nobody will be confused in practice. The only D&D books on store shelves after 10 years of 5E will remain compatible with the new books, so nothing for anyone to he confused by, other than "hey, new books."