The difference is that the automatic numbering is
lost. It's a
serious difference, in that it pretty much ensures that people
will stop using that notation.
If we don't think the numbered url references are
useful, then
it's fine that it's being lost.
Yes, that's pretty much the issue I agree. From my point of view,
it's good riddance. I didn't much like the feature (I think every
link should be described in place), so I have no problem getting
rid of it. But if there are lots of other people who think it's
the greatest thing since sliced bread and can convince me that it's
vitally needed for something, then I'll reconsider.