Apple One Hot Tip!

If you have a family and you drop from Apple One Family/Premiere to Individual, you're going to have a really tough time when you realize your mistake and try to go back to one of those plans.

The issue will be worse if you just added more iCloud data right before doing this step.

Apple will spin their wheels, transfer you 6 times and remind you many times that their actions could lead to data loss which really ups the stress on these conversations.