I didn't see much on the firewall on this. Is there patch notes to see what this update does? I didn't see it on Up2Date Announcements.
Looking forward 7.4.
Thanks!
To reinforce this, it is completely possible that if your device is already not stressed overly, that 7.400 will also just just fine. The upgrades are optional and *not* required for continue support/warranty/operation. We just took this opportunity to allow for more life out of the existing appliances that could benefit from more memory instead of just end-of-lifing them and forcing new model upgrades on our customers or leaving them behind feature wise. It also allows for owners of some older 1xx/220 appliances a cheaper path to obtain the latest revisions.
So while you are free to upgrade, and 7.400 would run best in many environments with 1024mb of ram, it is not mandatory.