Where you getting this from?
It's what they did with the I1, I am wary with my I2, (especially with no go-back feature).
We have all seen that video of the guy racing the I2 around on 1 pack. I don't need to race around when I shoot real estate jobs, 1 battery charged to 100% will do it. I would always prefer to have a second battery at 100% for the next house, (these are only 5-10 minute shoots) and and don't need two batteries for 1 house.
THIS firmware update prevents you from using only 1 pack. The I1 used only 1 pack for years b4 guys started adding auxiliary packs for extended flight times.
Please don't hobble my new I2.