[ 2022-11-30; Reflector poll ]

Set priority to 3 after reflector poll.

"NAD as specified, the Remarks don't need to be precise, they already allow caching to be omitted if not needed. But we could still enable const overloads of begin for cases like these."

"NAD, no need to complicate constraints for such contrived examples. We don't care about random access, sized, non-common ranges like the first case. Any change here should be a paper covering all adaptors, not a piecemeal issue."