Then you have other sites/companies that go the opposite way: having functionality that is App-only. As an extreme example: my health insurance provider in Spa

Then you have other sites/companies that go the opposite way: having functionality that is App-only. As an extreme example: my health insurance provider in Spain (Alan) is app-only. They don’t even have a website one can use. It is maddening for those of us who always prefer desktop over mobile.