That is what CopperheadOS, and now GrapheneOS, provides. Its a level of "battle tested" that most OS and app devs never have the opportunity to have. Deleting the signing keys during a hostile takeover attempt rather than submitting to pressure or greed is an amazing quality that is rare to find.

So what exactly would you have done? Risk the key being taken over by a shady entity? Does the alternative really scream "mature, stable, and thoughtful" to you?

It looks like a very mature action to me: It certainly avoided the compromission of an OS that aims to be secure after all. It is not some windows OS with encryption keys sent to the cloud, so if security is compromised I fully expect targeted devices to break.

Understandable wishes, but you might have to put something from yourself into it if this is a pressing concern. Or you will be left to your own corporate devices.

Mental health and wellness issues in high tech research and development are everywhere. I would suggest that you focus on the product and what it can/cannot do for you.

Then avoid GrapheneOS

The path to maturity requires immaturity.