[xxxtentachyon]

You could, however, functionally live on the transit system if it were free (or cheap enough, or fares unenforced), as we see in New York or Philadelphia. Granted, that’s a problem of enforcement and other social ills as much as it is one of a cheap system.

[sudosysgen]

Ticket fares are only a few dollars. You can panhandle that amount in less than an hour. Doesn't change anything.

[rbanffy]

If we had on board habitation facilities, it’d be workable. Doesn’t seem very practical, however.