Microtransit: good or bad for cities?

The question about all these private operators, seeking to create something between large-scale transit and the private car, is this: Are they going to work with high-capacity transit or try to destroy it? There are signs both ways. If microtransit co-ordinates with conventional big-vehicle transit, we get (a) lower overall Vehicle Miles Traveled, emissions, and congestion, and (b) stronger cases for transit-oriented land use and thus (c) better, more humane and inclusive cities. If they compete with it, drawing away customers from big vehicles into smaller ones, we get the opposite.