cool2go aw22 hooram95 We recommend against delaying updates for so long. It will result in not having current patches for serious privacy and security flaws fixed in recent updates. Consider enabling charging optimization (80% charging limit) and leaving it plugged in so it mainly powers itself from the charger and doesn't wear out the battery but still stays updated. You can enable the automatic reboot feature in Settings > System > System updates so it will automatically reboot after installing a new update to start using it. That way you can simply leave it there connected to Wi-Fi and it will be keep itself fully updated. That's exactly why we added the opt-in automatic reboot while idle toggle.
Falling way behind won't cause anything to break since backwards compatibility is meant to go all the way back to the initial release for the device. However, updates from recent releases are much more thoroughly tested than doing it from a much older release multiple major versions of Android behind such as updating from Android 12 to Android 16 on a Pixel 6. This isn't applicable to falling behind a few months and it's meant to work even for going from a much older release to a newer one.
Every release in the Stable channel goes through public Alpha and Beta testing. It usually takes a day for a small release to go through public testing and reach the Stable channel. It takes longer for quarterly or yearly releases or major changes to GrapheneOS. New releases are made to fix issues discovered in testing and those releases get their own public testing time period, although it doesn't have to be as long if the changes to fix the previously discovered issues are small. It took around a week of public testing for an Android 16 release to reach our Stable channel after the initial public release on June 30th.
You'll use significantly more overall bandwidth if you update every 1.5 months since we typically only provide delta updates going 2 to 4 weeks back. Instead of regular 10MB to 80MB delta updates and then around 300MB to 600MB delta updates for quarterly/yearly releases, you'll be downloading a huge 1200MB update if you fall too far behind.