There are lots of new models they could do that would work for me.
One computer package I use puts in a new number up front for big changes and little ones for small incremental things. I'm usually not even sure what version it is until the big changes unless a package warns me to update. Apparently I have 4.1.1 installed write now and the most recent one is 4.2.2. I think one of the flavors of Minecraft does the same.
So 5e-2024? 5e1.01? 5.5? Whatever. The only problem I'll have is if they keep letting Amazon sell it with the note "The essential rulebook for Dungeons & Dragons (5th edition)" and the changes are big enough that someone buying a previous one labeled that same way will be greatly disappointed that they don't have the rules in the new one, and that it isn't fixable by a few pages of errata.
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I guess a pair of questions I have about editions and D&D is:
If WotC had just kept calling the new 3.5 printings 3rd edition, would that have been problematic? (Would folks have been shocked if they showed up at a table with one and it was the other?)
If TSR had called the later printing of 2e with a new cover 3e, would that have been problematic? (Would folks be disappointed buying the book and expecting changes, only to not get them?)