No, they do not. They have a file manager, but it is better described as explicitly shared storage access only.

How do you drag with the right button on a touchpad?

Good, they added it. It is not such an innovation, and it is not THAT useful because you’re stuck in the normal laptop position. If they made the device open so that the keyboard sits on the back of the screen, and maybe added stylus support, it would be something. What I mean is that I am not sure what they want you to do with the touchscreen.

Of course, the merged OS will not have file system access and it will only run Apple-approved apps.

It is a buggy SPA.