Earlier quoted context omitted.
Current versions actually support both stationary and room boundary. Also, since you begin in Passthrough mode, you can start using the device immediately (and only set up boundary when you actually need it - apps trigger space setup only when moving to VR mode for the first time, if needed).
Stationary is really bad though, it won’t move your perspective with your head movement. Better to setup a room boundary, even over furniture, and just stay in one place.
It does move perspective, though?