I think perhaps you are interpreting my statement as indictment of public transit. That is usually American debate, I am not against public transit, in most denser countries it is absolutely essential.
I commuted in Mumbai trains for years the experience is terrible and dangerous, in most dense cities there is no other cheap reliable way to get anywhere, even in richer cities like NY the system is pretty bad if you care at all about your journey beyond getting from point A to B.
Scaling is hard for public transit, very very hard, it does not matter how wealthy the city is either. Poor cities don't have money to expand, rich cities have ton of legacy infra, politics[1] and other systemic issues. The NY 2nd avenue line is 100 years in the making and costs $15-20B and it is just 9 miles long. There are some good transit systems but most of them are have ton of problems.
Fr vast majority of people, trains (or managed SaaS ) would be good fit for their needs, however that does not mean it is always better in every metric and fits for everyone, for some people control and experience and other aspects is more important than what managed solutions can offer there is nothing wrong with that.
[1] Large scale SaaS apps unsurprisingly also have similar problems
