The biggest problem is finding what you want. Need a TV Guide for streaming, so I can search for say "The Martian", and it would tell me "This is on netflix in your country", or "this isn't available on subscription, but you can rent it on amazon for x.xx or buy it on apple tv for y.yy"
Also you can't get most streaming content on cable, or the sports content I get on cable without 4 streaming services (ESPN+, Peacock, Paramount+ & Hulu).
So I've got a cable package w/ sports + a couple streaming services. Sometimes I'll pick one up for a month or 2 and drop it just for something I want to see. Sometimes I rent something from Amazon.
It's just a mess.
But the search is pretty easy. My Rokus, Amazon sticks, or even cable box search fine for me.
Also has a nifty feature where you can list all available episodes of a show across all seasons and it will mix in your live recordings with streaming options. I honestly don't know why Tivo doesn't get a lot more love. Cable when you aren't paying per-TV fees for boxes is pretty great. Just a couple of bucks a month for a cable card in the Tivo and then you hook up Tivo Mini units on all of the other TVs in your house to access the main box.
If they are just a content provider to apple, they lost.