Motivating phase space realism:

Descriptions of systems in terms of energy and momentum more fundamental that spatiotemporal properties. (Amelino-Camelia especially.)

Analogy between relativity of simultaneity and relativity of locality. Latter explained by invariant phase space interval with observer-dependent slicing of phase space.

2 concerns with latter motivation: doesn’t tell us phase space absolute features more fundamental than decomposed bits; global vs local quantity distinction rather than absolute vs relative quantities.

At most uphold momentum space realism rather than phase space realism.