I have been installing ROMs based on SOT in the past. SOT and battery life are highly relative according to the user. I would strongly recommend you to use this ROM for a week or so. Charge it to 100 percent daily in the morning and use it through out the day without charging it. Just average the SOTs for your daily operations over the course of a week. For me the battery life is not that great as I rely on GPS and mobile data a lot. My avg SOT is 3hrs (I just replaced my battery and got a new one, so if you are using an older battery you will definitely get lesser SOT). The greatest perk in battery life in this ROM compared to aosp roms is the drain while idle, I just loose 1-2 percent when the phone is idle over night. You can also read pdfs in aeroplane mode all day long and get a SOT of 8hrs
When I used stock Oreo, my battery usage overnight was 1% or 2% on Wi-fi. I was impressed. Most of time the phone showing 1% loss. My SOT was alwmost everytime 6 hours on wi-fi
But Pie man... I turn off everything except mobile sim ... 3% and barely reach 5 hours SOT on Wi-fi. And just to know, i'm using S8 Plus...
I probably won't try to downgrade from Pie. I don't want to lose Samsung Pass. About warranty, I'm confident that I'm not losing it because of European Directive 1999/44 ( https://eur-lex.europa.eu/LexUriServ...9L0044:en:HTML)
I really like Samsung experience icons, AOD font, battery life, and charging speed, plus deep black themes. But also it looks outdated. I think in Pie charging speed is not so fast as it was on Oreo.
I was really happy samsung owner untill pie which forced me charging my phone every day. I'm sure software procceses make the battery bad. It's not just the battery wear over the years. I noticed the battery drain even after updating to pie. SOT went down in the same usage as it was in Oreo.