This is an important feature that, statistically, nobody uses. Worse, I challenge you to try it on a major site. :(
Again, I like the argument. I just feel there is more taking about it, than benefits from it. Empirically, it just falls flat.
You are probably right. But also statistically, "nobody" is disabled or needs accessibility features. That's a poor argument for running in the opposite direction from providing them.
Benevolent systems cater to the least powerful user, not the median user, and I think it's good to support benevolent systems wherever possible, because businesses are naturally biased against benevolence.
The benefits to developers are more "trade-offs", but I think it generally is a better raw framework to work in without significant IDE-assistance to do development.