Much to think aboutpic.twitter.com/4rMpt8cFGE
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As a result, it's the least practical form of transit imaginable if you're trying to make a service that's specifically aimed at the poor. So why do we bother? Because we pretty much only build with cars in mind, so everyone needs one whether they can afford it or not
With shared rides and clever dispatching, TNCs can do it a bit cheaper, but capacity is still nothing like fixed line buses. Also you can prioritize buses (dedicated lanes, signal priority) precisely because there are comparatively few of them. You can't prioritize EVERYTHING.
Final mile can be a tricky problem. In the US, a taxi system might be a useful stop gap until urban planning catches up.
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