I don't know all issues associated with ML pulling money from JWH, but he clearly had other things going on, i.e. Bosox, London trend following competition, large DD. It is also interesting to note that Graham Capital run by his former President is quite successful today and of course makes significant money from trend following.
I appreciate your long and thoughtful reply, but specifically to JH and G... why would "clearly had other things going on" matter? I thought a big selling point for trendfollowing was, set it and forget it. No need to make discretionary trading decisions. JH had lots of quants and traders to keep the blackbox humming along, regardless of whether JH himself was at a baseball game or whatever. And G is a multi-strat shop nowadays with many many pods, not by any means a pure trendfollower. If you don't believe me, call KT and ask him...