OP here: very true. We're not done with performance measurement and benchmarking until we fully account for taxes, and for all fees as well. My grand vision is

OP here: very true. We're not done with performance measurement and benchmarking until we fully account for taxes, and for all fees as well. My grand vision is a system that does that effortlessly for every individual investor. But that's a tall order, considering the data that's needed. We'll get there. But it's probably a long way off. One step at a time.