Reuben Thomas <rrt@sc3d.org> writes:
>> What if you are running this remotely using TRAMP? What if you're on a
>> laggy network with an NFS mounted filesystem? What if your disk is
>> failing and this command takes several seconds to complete? etc.
>
> No different from any other command that interacts with the disc and is
> normally run synchronously.
Yes, so your entire Emacs session will block. In other words, less than
satisfactory.