OK, bootable USB OS. Considering it's for 10 digits of people at the bottom of the technological learning curve on little more than trashed hardware, how confid

OK, bootable USB OS. Considering it's for 10 digits of people at the bottom of the technological learning curve on little more than trashed hardware, how confident are they that each copy WILL work on any/all combination of host hardware & users? This seems the kind of thing has a very high "fiddle factor": gotta fiddle around to make it work, something hardcore geeks love but few other can get anywhere with.