I left this comment 2 weeks ago on a youtube short on the subject:

"I have an opinion on the legal matter. But I think it's worth noting that destroying the data was a categoric strategic blunder by the defendant. If you don't destroy the data, but just don't provide the password, they might never be able to recover the data, perhaps with the exception of a multi million dollar cryptographic attack.

Destroying the data is a strategic mistake even if there's a mildly strong case that deleting the data is a crime, as it provides no benefit at the cost of increasing the risk of being sentenced for evidence tampering. I personally am not appealed by the grapheneOS thing, but I can't see any case were that feature would be beneficial, it sounds like a shitty technology."

To me this is evidence tampering, and again to me, it's a great law to have that evidence cannot be destroyed. But even if you argue that it's a bad law, and even if you argue that this was not evidence tampering, you have to concede that it IS the law and that it IS highly likely that courts will find it to be evidence tampering, finally that there is little value to destroying encrypted evidence. It's a categoric legally strategic mistake.

And GrapheneOS is a dumb product by consequence for this matter, unless you are like some high level spy whose security model is being tortured or dissapeared instead of being put to jail.