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. This is always a real pl

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. 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. 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.