That's a false dichotomy. You can still travel at 50mph with air conditioning (in a car) either way.

In fact, building proper bike lanes doesn't mean you can't have self driving cars too. It just means the people who didn't spend tons of money for a self driving car are less likely to hit the cyclists.

Depends on your purpose. Bikes are great in cities, are better for the environment, are much quieter (better for others outside), are safer for pedestrian, and are great exercise.

But anywhere you could be safely traveling 50mph+ is probably not the type of road I’m advocating building bike lanes on…