Cross-checked my rolling-window SWR against AllocateSmartly and got a 2.5pp gap on 60/40. What would you investigate first? (opens in new tab)

We computed Bengen-style rolling 30-year safe withdrawal rates for 80 variants across 51 published TAA strategies. Every single one clears 4%. The best unleveraged TAA strategies (VAA-G4 SmartStack 15.3%, HAA SmartStack 14.2%) sustain real withdrawal rates 3-4x higher than Classic 60/40. Why TAA defeats sequence-of-returns risk, and four honest reasons you should still anchor your retirement plan closer to 4% than 15%.