>Back when VHS and DVD's were the thing, you'd pretty much get a very finite amount of choices, and usually went with one of those. Of course, you had the huge rental stores with thousands of flicks, but in most places, the selection was just a small fraction of that.
Streaming has even less choices. The Netflix catalog for example is laughable, and they push even more for their own stuff.
I don't know if (Netflix catalog) has shrunk, but it seemed to be much larger back when they started out. I guess it's a result of too many steaming services, it's almost as we're back to the days of cable - but instead of various packages, we're paying $10/month to the various services.
Sad to say, but (semi-legal) services like popcorn time etc. were almost the pinnacle of online streaming. These days, I still have to fly the black flag, from time to time, if I want to find certain titles to watch on the go.
Netflix != streaming. You can generally stream almost anything, but it requires having the correct subscription: Netflix is just one of many many many. If you cobble together the 10-15 or so core streaming services, you effectively have re-built a cable television plan worth of networks, and there will be tons of choices, which you then access using something like the Apple TV app, which acts as the modern TV Guide and will automatically open the correct streaming service required to watch the movie/show you selected. Netflix was a disruptive service for DVD rental, but in the world of streaming it is only relevant because it saw the writing on the wall and used the money it had made to invest in building its own production studio. (Hulu has a slightly different way to bootstrap involving acting as the gateway infrastructure for networks while they built out their own tech; and Apple and Amazon exist only by shear force of cash combined with a level of competence Yahoo did not possess.) Off the top of my head, I have subscriptions with Apple TV+, Netflix, Hulu (with the Starz add-on), Peacock (NBC), CBS All Access, HBO Max, Disney+, and Amazon Prime Video... but I am certain I have something like five more that I am forgetting (does Adult Swim have one maybe? I am not sure as I just buy Rick and Morty from iTunes; I know Paramount+ exists, but I don't think I subscribe yet... oh, I must have AMC+, right?).
Streaming has even less choices. The Netflix catalog for example is laughable, and they push even more for their own stuff.