Roman offers such great survey capabilities, from wide to deep to ultradeep, that it might be easier to ask “What science can’t it do?” High-z emission-line galaxy samples will increase by orders of magnitude! Choosing Roman Deep Fields ASAP will allow observing proposals for expensive-but-needed complementary data. Astrophysical data science is advancing rapidly; hard to extrapolate, but should at least use current state-of-the-art (e.g., non-parametric star formation histories) in planning community surveys with Roman. The photo-z methods and clustering analyses used for cosmology today will be galaxy evolution techniques in the Roman era.