I don't think so. If only poor people use X because wealthier people have Y, then X will suck. If Y is prevented by law/ordinance, then X will get the attention and investment it requires to keep the wealthy people happy, and most but not all of those improvements will be relevant to the poorer people. (As opposed to the split situation, where X will get the bare minimum necessary for housekeepers and store clerks from disappearing entirely.)
If only poor people use X because wealthier people have Y, then X will suck.
That is what happens now, it's the better off buying new cars, poor people get the hand me downs. This is fine because eight year old cars do the job.
If there are no eight year old cars to buy because the better off stopped buying new or because they bought electric which only have a practical life of eight years then they are stuffed.
