> The "practical" reasons all favour the 60-bit word. The advantages of the 64-bit word are of the kind that appear more fundamental. The best that can be said

> The "practical" reasons all favour the 60-bit word. The advantages of the 64-bit word are of the kind that appear more fundamental. The best that can be said of the 64-bit word is that "practical" considerations have a habit of disappearing in time. Interesting, in long lived cases this could be considered another form of "technical debt", or "impedance mismatch", but due to ephemeral requirements.