The main reason may be simply that it takes time to read such a paper.
It takes me at least half an hour to read the first 3 sections.<p>This is always a real pleasure to read a paper like this,
which dives us into the matter at the first sentence,
gives a good overview of the stakes as well the concerns,
and sketches the solution skeleton with convincing arguments.<p>Nonetheless, this would require to be more deeply involved into the domain,
to be able to make insightful comments or even to point to related papers or alternative approaches.