Subject: Re: Machine Learning and Mechanical Investing
Complicated by the fact that I seem to have less drive & compulsion to squeeze a few extra percent out of the investments.

This is OT but I think that's a general tendency when getting older. Decades ago I tried with statistics and later with neural networks to make money with stocks, programming for a while day and night on my systems. Money came (by old fashioned work), age came, priorities shifted. That shift of priorities I think is the norm in the 2nd half of life. I pity people who have money and who's goal nevertheless only is to make more (other than it being a fun hobby, like it seems to be for Warren Buffet).