I think there's huge pressure to "everything app" very disparate services. I've also noticed that Amazon now lets you pull up your Whole Foods code or pull up the Whole Foods storefront from the Amazon app.
Honestly, I think this could go much better if they just organized their damn software better and not damage their music offering with forced podcasts. Many of us would probably stay loyal and use it for podcasts as well if they made the experience great instead of forced.
My initial claim only works for Uber Eats. It can only be used for ordering food. There's a button to order a ride but it redirects to the Uber app.
But I believe you're right that initially they were more separate entities, but now it's kinda merged.