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If you do a little searching you'll find a method of testing dice for randomness. It involves letting them float in water, or something similar. Check it out...
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Thank you, I will take a look.
Trying to find what could possibly go wrong I was wondering also if the assumption of independence of events is still valid if two dice collide. So I would toss the dice one after the other just in case, as the math behind assume rolls are independent events.
If you look at lottery events they probably use a machine to roll dice to guarantee independence of events. I don't want to be too paranoid there too and discourage you though.
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I would still be personally worried about bias from dice (but I may be biased hahaha).
To avoid that, I would not buy used dice or someone else's dice. There are people who put it into ovens to cheat on Dungeons and Dragons (https://www.reddit.com/r/statistics/comments/3246r7/where_to_buy_loaded_dice_for_teaching/).
I would still be paranoid about dice so I would buy those advertised for casinos. And even then I would still be worried so I would use the idea of Ava Chow I saw on Nitter to use the von Neumann skew-correction algorithm or a variant. And I would do my own research about the different algorithms used, although the one you shared seems perfectly fine.
Everything written above could be overthinking. Also factually people who used dice with the coldcard were safe. So factually those who used dices were proven right to do so. However I would still keep diluting risk by using multisig because this is where I feel confident and have put thought and effort into.
At the end of the day, the diversity of ideas to secure bitcoins is interesting to see and I learned something new from the way Bitkey does it. Although I didn't like the aggressive marketing they did and I would not use it myself. For those who prefer dice, I think they should go for it.