Isn't that generally the case, though? Sure, not rootable on day zero, but usually it is only later models that get some hardware patch, leaving the earliest models with the vulnerability.
What keyboard do you use? Do you need something like Unexpected Keyboard, or are you still able to be productive in vim with a more "standard" Android keyboard?
You don't have to use a "classic email server", or even link your account to your current email address at all. The default onboarding procedure actually creates a new anonymous account for you on the default chatmail server. Reading through the site, I can't actually even tell why someone would want to use their preexisting email address.
Android gesture navigation replaces the system back button with a swipe from the edge of the screen. This in itself causes an issue with apps that (since long before gesture navigation was introduced to Android) use an edge swipe gesture to activate an in-app feature. The first app that comes to mind as an example is Termux. Swiping in from the edge of the screen opens the side menu in the app. But with gesture navigation enabled, this same edge gesture instead triggers the system back button, closing the app. I have seen some third party Android skins offer an option to only trigger the back gesture when swiping from the bottom 50% of a side edge. In the case of Termux, swiping from the top 50% would then open the menu as expected. Alas, GrapheneOS does not have this option.
Aside from this intrinsic issue, I also experience bugs in certain apps that are resolved by switching to 3-button navigation. From what I can tell, this might be fixed by these apps implementing newer/different Android APIs or something. I don't know. I'm not an Android developer.
Even with the previous issues resolved, system gesture navigation is all about swiping from the edge of the screen. What I want (and Thunder provides) is the ability to swipe from anywhere onscreen in order to go back. Sort of like swiping away a card. This is a behaviour that is only implemented at the app level.
Neat, it does work if I switch to the Apple theme! One criticism that I still have about it is that it only works when swiping from within the left 10% or so of the display. Which I assume is by design. It would be nice for the user to be able configure that threshold up to at least 50%.
How so?