What's your opinion of von Neumann and Morgenstern's work on decision theory? Do you also consider it to be "later found irrelevant" or do you think consider it an exception to "usually"? Or do you not consider it to be "philosophical"? What about philosophical work on logic (e.g., Aristotle's first steps towards formalizing correct reasoning)?
I noticed that recently I wrote several comments of the form "UDT can be seen as a step towards solving X" and thought it might be a good idea to list in one place all of the problems that helped motivate UDT1 (not including problems that came up subsequent to that post).