I have heard talk of a movement to get shows available on all streaming services and having the various streaming providers compete on quality and features rather than exclusive content, but that sounds like a lot of wishful thinking. There was references to a Supreme Court case from the 50's that did something similar for movie theaters, as before that time theaters had to either be owned by or give certain studios special treatment to show their movies. I remain doubtful though.
There's not much of the back catalogue either though.
Disney+ Lineup: All the Shows and Movies Confirmed for Streaming Service
Down the bottom is the full list.
If you have kids, that content is killer app levels.
Nope no kids.
If they had the MCU, all the Star Wars stuff, decent new Star Wars cartoons (Resistance just got cancelled), and the classic Disney movies (pre Alladin) it would be tempting.
I think you need around a dozen decent shows or a huge back catalogue like Amazon.