Stream-to-initial-mass ratio versus total angular momentum of the simulated streams at the present day. All simulated visible streams have total angular momentum L ≳ 800 kpc km s⁻¹, a selection effect resulting from the preferential disruption of lower-angular-momentum subhalos by the tidal potential of the growing main halo and disk over the past ∼8 Gyr (disk potential from J. Bovy 2015). The vertical dashed line marks 1000 kpc km s⁻¹.