To be fair, the Tidbits title is misleading - the M5 was not bricked, as the Genius Bar was able to activate it using ethernet, as the OP would have been if he had an ethernet adapter himself. But still a cautionary tale, because if you travel with your notebook and for some reason needed to factory reset it, that could be problematic if you don't travel with an ethernet dongle.At this point… The TidBITS OP’s final words seem to be decent cautionary advice:
And, again, still waiting to hear if yesterday's release of 26.4 has fixed this issue.