  The impressive images from the Event Horizon Telescope sharpen the conflict
between our observations of gravitational phenomena and the principles of
quantum mechanics. Two related scenarios for reconciling quantum mechanics with
the existence of black hole-like objects, with "minimal" departure from general
relativity and local quantum field theory, have been explored; one of these
could produce signatures visible to EHT observations. A specific target is
temporal variability of images, with a characteristic time scale determined by
the classical black hole radius. The absence of evidence for such variability
in the initial observational span of seven days is not expected to strongly
constrain such variability. Theoretical and observational next steps towards
investigating such scenarios are outlined.
