[tuckerman]

I think this depends on the context.

If the only way I interact with a service is a single app then I want that app to blend into my phone. I don't care if the Uber app on Android and iOS are the same, I only see one of them. If I have to use a service on many different platforms, I sometimes prefer having a consistent design language, e.g. I like that Slack has a consistent sidebar interface everywhere. I want to go from the browser to tablet to phone and not have anything in a different spot.