Neonchameleon
Legend
But you can't count 3.0 and 3.5 as different editions but treat 4th and Essntials as the same.
Why not?
At my table the impact of Essentials is that of a couple of good splat books and a monster manual. You can sit an Essentials Wizard down alongside a PHB wizard and almost no one will notice. Essentials rangers or fighters play quite happily alongside PHB rangers or fighters. The DM guidelines for handing out treasure have changed. But that's DM guidelines - I ignore both equally when it suits me because they are only guidelines.
Compare that to 3.0 -> 3.5. You couldn't sit down with two bards at the table, one from each PHB - there are serious upgrades to one but not the other making a large power change rather than being in practice two different classes. Or two rangers. For that matter put two PCs side by side riding horses. One's ten foot wide, one's five foot wide.
And that's why it's consistent to call 3.5 a different edition and Essentials not. You need to actually know which edition you are playing between 3.0 and 3.5. (I could make the argument that 3.5 is at least as different from 3.0 as 2e is from 1e). You can mix 4e and Essentials with no problem at all on either side of the table and without having to specify what you are doing other than use of magic item dailies.