I am not resting assured from those two videos, so in that regard, I have my doubts that shamir backups are a slam dunk as better than multi-sig.. including that multi-sig allows for not having to bring all the keys together at the same place (even though surely Antonopolis had pointed out one of the dangers to have the  public keys for all three but maybe only needing the private keys for two)

It seems that one of the dangers that bitebits was wanting to lesson is the potential problems of being reliant on one manufacturer, but sure, if you end up overcomplicating your matters, then you become your own danger to yourself.