Assuming you meant 5E instead of 4E ... I disagree. But maybe I'm biased because I've been DMing it forever. I have no problem running campaigns up to 20th. The game isn't perfect, but I do think it works better at higher levels than previous editions.There's a GM shortage. 5E at higher levels doesn't really work that well.
The wheels start falling off as early as 5th.
I'm the only one running at 9th level at the gamestore.
The new DMs can't really figure it out and the wotc modules are tubed to be easy so they don't really learn.
As far as what that has to do with the surveys or modules I have no clue. I think modules for higher level PCs are likely to fail simply because by that point there is way too much variation in group dynamics and power level.