Not knowing your city I can’t speak to that, but I’ve been both a cyclist and a pedestrian in those circumstances and it fucking sucks. People tend to spread out when they walk, and cyclists are typically moving fast enough that walkers are effectively stationary in comparison. So walking becomes a frustrating exercise in dodging bikes, and cycling becomes a frustrating exercise in avoiding clumps of people (along with whatever other crap is placed on the sidewalk without considering cyclists.)