But do people expect the apps to look the same? I think people want them to behave the same with a few visual features kept intact. To take Discord as an examp

But do people expect the apps to look the same? I think people want them to behave the same with a few visual features kept intact. To take Discord as an example, I don't know that people actually can't live without the UI slavishly copied for every platform; I think people rather want light and dark themes on all platforms, message formatting to look basically the same, and for everything to be found in roughly the same place. This idea that users expect apps to look the same is, I feel sure, something someone said and everybody has gone along with. In my experience, people want things to behave consistently — so if Discord had a native Windows client and a native macOS client, people would be more interested in whether or not they could still find the little microphone and headphone buttons at the lower-left of the screen, sod if the icons and colours are identical.