Don answers a range of listener questions covering topics from Fidelity’s fully paid lending program to the Roth 401(k) decision and mortgage payoff strategies. He explains why stock lending rarely adds much value for ETF investors, why paying off a 2.6 percent mortgage makes little financial sense, and why even Berkshire Hathaway isn’t a substitute for true diversification. Listeners also learn about HSA payroll tax savings and how to build Roth flexibility without triggering the pro-rata ru...