Hey,
I have been using the Nothing OS 2.0 from the day it was available for me and my long term usage till date feels like , Nothing OS 2.0 is more for Phone 2 rather that Phone 1 , it provides more customisation options but animation feels laggy and phone tends to lag a lot while opening and closing any application, animations were smooth in the older OS version , got 2 or more patch updates afterwards but still OS 2.0 has to be polished more for Phone 1 , waiting for OS 2.5 Beta or stable whichever is provided ,
My Conclusion:
My experience of using a Nothing Phone 1 has been ruined after OS 2.0.