As others have intimated, and I've mentioned before, in the UK and much of the rest of the world, there is only a single app - Disney+. They've age gated their user profiles and while the fairly meaningless (to me) "Star" brand sits alongside Disney, Pixar, Marvel, Star Wars and National Geographic on the homepage, the carousel for me is currently leading with "The Kardashians" followed by "American Horror Story", "Moon Knight", "Dollface", "Crush", "Single Drunk Female", "Obi-Wan Kenobi", "Doctor Strange", "WandaVision", "Marvel What If..", "American Eid", "Marvel Legends", "9-1-1", "Mars" (Nat Geo) and "The Simpsons."
In other words, they happily mix and match regardless for my profile. And yes, "Pam and Tommy" has previously appeared in that carousel.
I'm certain that the future is a single app with Hulu being a brand within Disney+.
When it launched in the UK, Disney+ basically replicated the US version, but once they decided to add "Star", they didn't give consumers a choice - they added a couple of pounds to the subs and everyone got everything.
I realise it's a bit more complex with Hulu, with both with-ads and ad-free versions, but that'll probably be a Disney option at some stage too. It sounds like various non-Disney owners are pulling everything out of Hulu as their agreements lapse, so it doesn't really make much sense to have multiple apps unless Disney really really wants to keep "adult" and "kids" material well apart. The European experiment says that consumers get over it after about five minutes.
Now I do wish Disney would dig deep into the Fox film library and add a load of those, but barely any streaming service seems to care about archival stuff. No Criterion Collection streaming service or HBO Max for deep movie cuts in the UK...
Adam