Recently, I took this approach to get proper ACPI S01x sleep on my Lenovo X1 Fold (a wonderful device BTW, once you take the time to work around Intel drivers bugs)
A battery discharge rate of 0.5%/h in sleep is just great... but I think I can do better: I'm now trying for 0.25%/h.
Imagine if you could immediately resume your foldable oled tablet, and it'd have only lost like 6% of the battery. With a 20% hibernate trigger, it would remain immediately available for over 3 days straight!