Good analysis of Quora. Just to add a note to the teenage male nature of Quota it is definitely a male world. But this has inspired me to take another look at my preferences. I’ve worked in the IT, futurist and historical areas with physics, as you noted, being the seemingly richest area. I’m just a dabbler but it definitely needs a broader membership to balance out the political setups and NRA wannabees that cause me repeatedly to give up on it. Maybe we should all infiltrate from Medium. . .