That is pretty convenient that 4e Forgotten Realms is excused because it was the H4ters that were the problem not the actual supplement itself. That sounds like the kind of spin that Tony would come up with to explain why the most popular RPG setting is tanking. And honestly if I had not read the thing myself I may be tempted to believe it.
Not quite my point. It wouldn't have matter what they wrote for 4e FR. It wasn't going to succeed because far too much of the fanbase had rejected 4e. Even when 4e was an ongoing thing, it still only seemed to capture about 40% of the fanbase. The other two thirds wouldn't like any FR supplement simply because they didn't like 4e.
Whether or not it was good, bad or indifferent is largely irrelevant. It could have featured the best writing in history and it still would have tanked. Marry an unpopular system to changes that were also pretty unpopular and well, it's not a surprise that they are backtracking most of the changes.
Right, so 4e Dark Sun was too unpopular to succeed and yet with the much more popular 5e backing it somehow 5e Dark Sun is ...too unpopular to succeed?
Maybe the 2e Dark Sun never actually really succeeded, just some kind of glitch in the matrix when the Berenstain Bear patch was uploaded.
Umm, I think you're missing the point. No one has claimed that a 5e Dark Sun would be unpopular. 4e Dark Sun, again, because it was tied to 4e, had zero chance of gaining broader acceptance. Like Forgotten Realms, they could have done a line by line recreation of 2e Dark Sun and it still would have failed because 4e failed. When you've lost 2/3rds of your fanbase, it doesn't really matter what you do from that point forward. The writing was on the wall.
What's being argued here is that a 5e Dark Sun, that leverages 5e mechanics (classes, races, whatnot) would have the advantage over 4e of actually being a system that is widely accepted. We're to the point (looking at what's being played on Virtual Tabletops anyway) where 5e is being played more than every other game combined.
Obviously that was never true in 4e.
So, if people apparently LIKE 5e, bringing out a setting that rejects 1/4 of the 5e PHB, and rewrites pretty much all the baseline assumptions, in an attempt to recapture the setting as it was presented for 2e (a system that no one actually plays anymore - at least, not enough to actually matter) is not something that any business manager will ever go for.
IOW, any 5e setting from earlier editions is going to have to be rewritten to some degree to accomodate that new edition. Trying to gatekeeper the setting by claiming that earlier canon must be adhered to out of some nebulous sense of trying to keep the setting "true" to its roots, is not going to succeed.
You have a choice. Either the setting will sit on the shelf and never be used, or you will get an updated setting that will leverage the popularity of the current edition. Those are the two options that are going to see the light of day. Anything else is just wishful thinking.
AFAIC, as I said earlier, they might as well go all in. Update the setting, using the current edition as a baseline, molding and modifying the setting to fit the system and then leave it up to individual tables to modify from there.