After all, not doing updates isn't the important thing, it is that the right piece of information is used at the end.
It's an important thing, in that we don't know how to do updates without getting misled in some strange situations. UDT uses other sources of information, and shows how that's sufficient in principle, but the current puzzle is how to make use of the information that UDT doesn't use, avoiding UDT's logical cornucopia (so that one has to deal with resulting logical uncertainty, and resolve it to a limited extent based on observations).
In my recent post, I outlined 5 conditions that I'd like a decision theory to pass; TDT, UDT and ADT pass them, while CDT and EDT don't. I called decision theories that passed those conditions "advanced decision theories", but that's probably not an optimal name. Can I ask you to brainstorm some other suggestions for me? (I may be writing a follow-up soon.)
As usual, it's best to brainstorm on your own before reading any of the comments. You can write down your ideas, then check if any have already been suggested, then comment with the new ones.
Thanks!