So I scrolled back through pages of root nodes in PMD, and I don't find this to be true. The last time BrowserUK posted was 19/01/2017, Bad reasoning?. I (among others) have posted in PMD more frequently**. There are also far more critical posts from other users. This posting states "No big deal, but ..." a few short, reasonable questions followed by "No urgency, but nice to know.". I see nothing off topic, disruptive or critical here.
Update: ** Within the period of time I bothered to scroll back through, which was 01/01/2017.