Wow is it still a thing? I had no idea. It always seemed to sit in this weird limbo between Spotify and YouTube Music (for people who just want to listen to music) and Qobuz and HD Tracks (for people who just want to listen to their new £250 power leads). Never sure what it was actually for.
Cheaper than Spotify for the number of users it gives you (at least where I live) and the app itself has functioned significantly better than Spotify's has in my experience so far while not depriving me of any of the artists and albums I listen to regularly. Early on in its life it was big time selling snake oil, but at this point it's just a solid alternative to Spotify and YouTube music which have both, frankly, gotten "too big to fail" and have begun enshittification because of it. Man we need more competition...
I've had a Tidal subscription for about a year. It's recommendation algo is way way better than Spotify and there are none of those spammy 1 minute tracks that Spotify has because 'artists' have gamed the system.
They don't have a Linux app but the PWA works fine. Minimize the window to reduce CPU usage (I know that sounds crazy but it actually works).
Their sound quality is just significantly better compared to Spotify. Even with my bluetooth earbuds I can hear the difference. Spotify and Youtube just sound muddy in comparison.