My opinion is that the follow-through of implementing the results of RFCs, including updating the authoritative documentation, is what is lacking. Some of that may be because people don’t know where to update the documentation or are afraid to because the canonical locations or documents may be in flux. Some of that is the “RFC assigning work to other people” problem. RFCs where the proposer is the implementer are easier in this regard.
Having adopted RFCs that are not implemented is a problem. I think some of these can be partitioned into a policy statement and then code implementation of that policy statement. The policy statement should be immediately recorded in authoritative documents upon adoption. The code implementation can be left for tickets. If we are lacking in authoritative documents, we should create them.