No doubt they will redefine maximum battery capacity to a figure that does achieve 80% over 1000 cycles. If you under-declare maximum capacity then there is a lot of headroom for actual degradation before you start to show degradation to the user.

A battery that can support 1000 cycles and remain above 80% capacity would be a literal brick. For an example the Vision Pro's battery has extreme over-provisioning and limit how long it would last. (note I know it is removable but that isn't the point).

I would wager that batteries that powered down at 20% and that halt charging at 80% would be significantly prolonged.

If Apple resorts to those tactics, then there is no limit in moving the goalposts.

In the meantime, my daily driver here in reality land: https://i.imgur.com/8yEEJVb.png