This is conjecture, and not supported by any studies I have seen. I'll ask again, how long is the calendar life of modern EVE cells?
Based upon below, I would guess that batteries kept under 85°F degrade about 3% per year, maybe 2% if kept under 75°F.
https://www.frontiersin.org/articles/10.3389/fenrg.2023.1108269/full#:~:text=For LFP, degradation is less,low as compared to NCA.
Temperature, SOC and time are key factors related to calendar aging in LIBs via three main mechanisms: loss of lithium inventory, loss of active material in the electrodes, and a rise in cell internal impedance.
The primary cause of loss of lithium inventory is the consumption of Li-ions by side reactions, including the creation of solid electrolyte interface (SEI) on the surface of graphite negative electrodes, the electrolyte breakdown processes and binder decomposition.
Loss of active material is often caused by electrolyte decomposition, and electrode particle cracking during storage.
Internal impedance in LIB increases owing to SEI growth, electrolyte degradation, and binder decomposition during storage.
Most researchers have concluded that the aging process slows down at low SOCs.
For LFP, degradation is less than 1% per year at 20°C (68°F) and 10% SOC. Even for temperatures ranging from 20°C to 45°C (68°F to 113°F), LFP show less than 10% capacity degradation per year.
Cells stored 35°C, though, do not reveal a major decrease in capacity. Despite the long duration of storage, the capacity charge and discharge voltage curves only showed a small decrease in capacity.
whereas cells stored at 35°C (95°F) only experienced just over 10% loss in capacity despite being stored for over two years.