This is true, today. But look at things like the Digital Markets Act in the EU; there is a significant chance those "super apps" iOS and Android are forced to submit to government regulation in the future, which will create new opportunities - if/once the App store monopoly is removed for example, the ability for any app to become the "super-app" is greatly enhanced, even if very hard. Twitter as brand and platform I could imagine playing in a post-mandatory App store landscape - but so too will a lot of others of course.