I used Tidal for about 3 years, and recently started a trial for Qobuz. Obviously a lot of this content is just 44.1/16bit but there is high res stuff mixed in. As many have stated, differences come down more to the master, or the conversion though, so that's where it gets complicated.
I definitely cannot hear a difference between it and well made .mp3's in a blind test, but to me there's some sort of peace of mind that comes from having high res files, almost like I don't have to worry about it, because I'm getting the best quality streaming that's available, and that's that, whether audible or not. To me the hifi streaming prices are cheap, I mean getting access to thousands and thousands of songs, many of which I would never own or have access to if I was just buying cds, is amazing. I also listen to lots of stuff I would probably never own, and am more open to trying new types of music with streaming services. I remember buying a cd for one song in the past and hating the rest of the album, or buying albums without ever being able to hear them before hand and being disappointed. That was a part of the fun for sure, but also can be frustrating.
Ultimately it would be nice to actually own the music, or have exact info on what master I'm listening to, but I think the benefits of streaming in general, especially high res outweighs all of that. I think where we can make better progress with the streaming services is just providing more info about the actual file, and the process it's been through to get to that point.