Many people on this forum will have no choice but to remain or become carfree after retirement. The combined benefit pensions are gone except for government workers. The majority of the population will depend on Social Security as their only source of income. However, it basically only pays enough to live indoors so the car has to be sacrificed.
Having said that, there are numerous people on YouTube living in vehicles. I can see this lifestyle going mainstream in the future because the cost of living continues to spiral out of control.