Why do you think is good? just the existence of seed phrase sharing functionality, even if encrypted, significantly expands the potential of a hack

Unlock Protocol founder.
Previously founder at Superfeedr (RSS push API) acquired by Medium!

https://ouvre-boite.com

right, but users with strong op-sec now need to worry about potential vulnerabilities from this sharing system that we all previously assumed was not possible

that is not true if you consider the alternative. People store their seed phrase in clear on a piece of paper...

firmware update isn't, though. if it was opt-in at that level, I'd agree with you!

it is not, the backdoor exists — "allowing" using the backdoor is opt-in

which means that I'd they decide not to ask you and break the law (or not break the law in case of a state agent), they can