one could assume that the battery usage on the S20 series will not improve as Samsung want to sell S21 series.
That being said, it is the software that needs to be fixed.
old Huawei phones got few years ago an update that made the batter last much longer,
it is the software, you can always optimize it to the hardware, but that would not make ppl buy S21 series, bcoz why?
Sorry, but for me it seems that Samsung does what Apple did, until Apple got sued for making their devices slow , so that ppl would buy new ones. In this case bad updates and stuff that is not working makes ppl go for the new phone instead.
otherwise i would think that Samsung programmers have both left hands....so how come they made S21 better? (if it is better, idk i don't own S21, but i got S20Ultra)
'it's not a bug, it is a feature' 😅😅😅
update that slows down your device, or no updates that may cause problems in the future leads to the same outcome = user not satisfied with the old device, forced to buy new one $$$.
Call it what you want, i can see a pattern.