The upfront cost alone of an additional battery, the planning of bringing the good battery, etc.
My 1911 days old battery still holds 80% charge after 907 cycles, which is plenty for both use cases and the laptop is definitely not worth the cost of an additional battery by now.
And if I have to theorize, I'd still bet on 100% charge over high load cycles. There's a *steep* downhill curve at 1100 cycles 😅 https://www.coconut-flavour.com/ccbonline/index.php?modeltype=MacBookPro11%2C1
If I'm buying a new battery anyway, and have a limited choice as it has to be compatible with the laptop, I'm not gonna risk using it when I don't need it.
@Wolf480pl @ayo I understand the desire to buy an insurance policy (an additional battery), but it's still just anecdotal evidence from one battery life against what appears to be a trend on multiple different laptop models 😄
Sadly I can't find stats for how much data they have, and it's not exactly proof without some kind of controlled group, but it's still very suggestive.