can you drive it to work and send it home by itself? And then ask it to come and get you?
No. The Tesla webpage and in-car guidance are clear on what you can expect from this feature and how the driver is expected to be paying attention. The car will also sense when you are not paying attention and take measures accordingly.
In other words, they're not really "autonomous". And they don't operate at night --- probably not in bad weather either --- or when communications are unavailable.
"Tesla is the only autonomous vehicle company in the United States that permits its remote operators to directly steer, accelerate, and brake vehicles on public roads."
https://tesorb.com/tesla-robotaxi-remote-operations-teleoper...