@hko For people who had previously needed to talk to programmers to get their ideas turned into code they could look at, yes, that was "the" noticeable bottleneck.
Or even just the intimidating one. (I suspect more people could have written code but were scared of it.)
The other stuff, clarifications while typing, and iterating back and forth haven't gone away (and now more people get exposed to this), but were previously hidden, and required more levels of indirection.