It's never once started on anything I own. For over a decade. The most voted-on item in its bug tracker has 9 votes on it.
RiscOS (which was a wilfully-obtuse comparison on my part, but since you're digging in [edit: in fact, creating an account on HN for no reason except to promote it on this thread], I'll run with it for your benefit) has without question already actually run on a number of devices -- though granted, not types of devices -- at least one or two orders of magnitude larger than this thing ever will, at the rate it's going.
RiscOS (which was a wilfully-obtuse comparison on my part, but since you're digging in [edit: in fact, creating an account on HN for no reason except to promote it on this thread], I'll run with it for your benefit) has without question already actually run on a number of devices -- though granted, not types of devices -- at least one or two orders of magnitude larger than this thing ever will, at the rate it's going.