Why are popularizing educational newsletter-frequency writers of important fields like Matt Levine for finance so rare? Because most fields are too slow or ambiguous, and writers of the right combination of expertise, obsession, and persistence are also rare. Matt Levine is the most well-known newslettrist (“Money Stuff”) in the financial industry, having blogged or written since 201113ya, finding his niche in popularization after stints in Wall Street & law. His commentary is influential, peopl...