  Optical timing with rapid, seconds-to-minutes cadences with high photometric
precision and gap-free long baselines is necessary for an unambiguous physical
picture of accretion phenomena, and is only possible from space.
Exoplanet-hunting missions like Kepler and TESS have offered an outstanding new
window into detailed jet and accretion physics, but have been severely hampered
by incomplete calibration and systematics treatments and, most especially, a
monochromatic single wide bandpass. Advances made using Kepler and TESS survey
data, when considered alongside detailed, expensive multi-color experiments
done from the ground, reveal the enormous potential of a space-based
multi-color optical timing mission with a high energy focus.
