Reminder: Discussions of how to go about backdooring a CA are offtopic for this thread, which is about concrete pros and cons of 90-day certificate lifetimes. @NOYB helpfully started a thread at Surveillance Advantages of Short Lifetime Certificates if you’d like to follow up there.
Also as a reminder: If you are posting to express your support for longer lifetimes, without discussing a specific pro or con, please “like” the first post in this thread. This helps keep the signal-to-noise ratio high.