When I first saw this phone I thought it was really good. After buying it I now regret that I wasted my money on it. Samsung does not provide any type of camera improvement or performance improvement or add any new features they only provide security patch update. They should provide good quality of update since it's a new phone.
the problem is peoples here sometimes user of other brand and they compare each and everything with them and wanted to get everything same as before which is not possible and sometimes they expected so many things i read one post few days before one person said no 3 finger screenshot in his mobile so he hate Samsung and feel like he wasted his money amazing yaar😃😃😃🤣🤣🤣😆😆😆
No I don't think there is any performance wise. I agree with battery drain compared to pie but no issues with performance. May I know how did you updated? For major updates like this it is recommended to do with smartswitch or odin or service center.