[deleted] No shenanigans whatsoever?
No shenanigans. The developers spent a lot of time on the feature because they do things right. Once the duress PIN or password is entered, the phone wipes itself.
[deleted] You can absolutely depend your life on this thing.
Please use your best judgement when using or relying on the feature. All personal data will be wiped, for sure, but after being wiped someone in possession of the phone can still figure out that GrapheneOS is installed, and can easily figure out that duress pin/password is a GrapheneOS feature if they put their mind to it.