Shrug
Your question implicitly presumes one system to be a hammer and the other to be the back of a screwdriver, both for the application of driving nails into wood. That analogy is so asinine as to make a detailed answer pointless.
Please find me a construction related website where more people decided after using a hammer that the back of a screwdriver was actually preferable, abandoned their hammer and reverted to the screwdriver. If your comparison was at any level valid then there would be some degree of equity between people reverting to 3E and people reverting to the backs of screwdrivers.
Gothmog, and by implication of your analogy, you as well, are claiming that 3E doesn't provide the right tool for the job. But unlike the back of a screwdriver for nails, vast numbers of people find 3E to be greatly superior to 4E for story. So, I'm forced to conclude that rather than an issue with the tool, the problem is more a matter of user error.
And if someone doesn't know how to use one tool and settles for the result an easier tool provides, then they have no basis for offering a judgment on which of the two tools offers the best overall final result when used correctly.