BUT PLEASE: No anchors adressable from outside! There is nearly no
difference to subpages.
I think I understand your point, but I don't follow your argument. Accessibility from outside was never an important problem with subpages. The key problem with subpages is that they created a "hardcoded" link hierarchy, and that they create ambigous and overlaping logical namespaces. Should Chess be it's own article, or should it be Boardgames/Chess, or Strategy games/Chess? It's not at all obvious that allowing HTML anchors would create these problems.
Perhaps I'm missing something, but I'd like to be able to see how --exactly-- anchors are "nearly indistinguishable" from subpages. If you see this more clearly than I, could you please explain it to me.
Yours Mark Christensen