Just a note on firmware in general, regardless of whether it's an OBi, a router, or something else.
Firmware updates provide fixes or enhancements. Firmware updates can brick your device if during the update power goes out or something goes wrong. Sometimes firmware updates are difficult to reverse, i.e. downgrade. Sometimes firmware updates fix one thing and break another.
OBi agreed back in 2012 to a) explain firmware updates, i.e. what changed and b) to post the update notification into a thread that would allow us to be alerted to an update by following that thread and getting an email that the thread had a new post on it. They haven't done either for 2776. Since Sherman is apparently still with OBi, this is not acceptable, he agreed to it.
I have 2774 on my OBi 110. It is working to my satisfaction. I'm not applying any update without OBi explaining exactly what it does.