Many users on a FB group complain about this, and it hit me yesterday. Please allow the user to cancel firmware update. An update is forced even when the user has no cellular or WiFi access.
Thanks for your suggestion, we will consider this.
Either the ability to postpone or cancel would be handy.
Plus 1 to this. Although typically I would not postpone an update, it nearly made me have kittens when it did an update on the morning of the Total Solar Eclipse in April!