Behaviour changes based on perceived availability of resources. I have "true" unlimited now - 100GB cap of 5G data. I have disabled all data savers. I stream music lossless. I backup photos asap instead of waiting for wifi. I don't even watch videos like some people do - Netflix on train is common - nor do I use tethering. I still hit 10-15GB a month regularly now. I used to be fine with just 3GB just a few months ago.