I estimate a sixty three percent probability that a/an babyeater would tile the universe with decision theory if and only if the set of all possible fetishes is isomorpic to the New York meetup group if and only if in the new version of Newcomb’s problem, you have to choose between a box containing any improperly-programmed upload and a box containing the configuration space of all possible minds.
How long can they get?
in theory? infinite. Well, until your computer runs out of memory at least.