Tesla is ditching radar, will rely on cameras for Autopilot in some cars

https://www.tesla.com/support/transitioning-tesla-vision:

“Beginning with deliveries in May 2021, Model 3 and Model Y vehicles built for the North American market will no longer be equipped with radar.”

Removing the hardware rather than than just experimenting with software that doesn’t use radar seems quite a gamble, unless they already did those experiments.

But if they did the experiments, why do they also write ”All new Model S and Model X, as well as all vehicles built for markets outside of North America, will continue to be equipped with radar and will have radar-supported Autopilot functionality until we determine the appropriate time to transition those vehicles to Tesla Vision.”?

That doesn’t make me feel they are sure this will work.