But not necessarily just because it's the latest edition. It may just be that the latest edition happens to also be the best for their purposes.
I don't think I'll be moving to D&Dnext, for example, if it ends up being like it seems in the previews to date.
I feel the same way. Up until this point, I have adopted/adapted to each edition that has come out, starting the the old Red Box.
But I didn't do so due to some pavlonian response to hearing "D&D". I did so because the new edition was an
improvement on previous editions. For awhile I was a lapsed D&Der, having bolted to RoleMaster.
With 4th, D&D finally had a system that hit almost all the right chords with me. Martial classes that emulated mythic heroes like Beowolf and Hercules. No mechanical alignment, and a sense of your character being a hero from the start, not some zero that had to plod his way to mediocrity some 3 levels later. Disposable heroes are great if you are hexcrawling or hack and slashing, but for campaign story arc it sucks for continuity and DM sanity.
And so far...everything I have heard and read is a regression to a time I HAPPILY left behind when I dumped D&D back in 2nd Edition, and to some extent, 3rd edition. At this point, WotC can count me out as a purchaser of D&DN. If I wanted a modular system, I have GURPS and HERO system. Heck, I have M&M available.
Do I think 4e is perfect...no. No system is perfect. But it suited my DM style and play style nearly to a "T". So I will check out 5e, but in the meantime, and for the easily foreseeable future, I will be running and playing 4e. Thank goodness for Hero Lab, C4, and everyone looking a fourthparty.