I am using Spotify in the browser. For a long time Spotify did not have a proper webapp; now it is ok but still with limited functionality. Fully funcional webapps (without the scandalous Apple fees) seem to me an obvious way to break the app stores
Why is this not happening? Maybe because many companies, including Spotify (despite the subscription models) also want to track everything we do. Spotify's app is filled with trackers and asks broad permissions.