I do, well almost!
I've been using Tidal for 6 months or so as my main source, albeit not exclusively. After using Tidal and Spotify side by side for a few months, I decided I couldn't justify both any longer and had to go for one or the other.
I went through my CD collection and starred my albums on Tidal, so 99% of my albums are now online. There are a few noteworthy omissions, particularly for one of my favourite bands, the Unthanks. Although there are a few albums that have now been added to the service in recent months, like Feist's repertoire. I adore Feist's ballads so I was really pleased to see her music appear.
It's not perfect, but suits me. At present I resort to Airplay, which serviceable but not ideal. When funds allow I would like to purchase a Bluesound Node to enable me to use Tidal using a wired connection from router to amp and to take full advantage of my broadband speeds. But I love the freedom of creating playlists. In the past I used tape and subsequently CDR for my own compilations. It's something I've always enjoyed doing, so creating playlists for each genre or mood or artist has been great fun.
Classical is another matter though. Although I guess classical is about 20% of my admittedly very eclectic tastes, the albums available on Tidal are mixed. There are some beautifully produced ones and there are some proper stinkers too. Sifting through them take some time: some albums, artists or composers are tagged in very odd inconsistent ways, so it can take some time to locate what you're looking for. And I tend to listen to classical music in a very different way. Other genres I enjoy musical discovery, trying new things, searching out new artists. And Tidal (like Spotify and the rest) is very good at that. But when I'm in a classical mood, I tend to revert to particular favourites that I like to play over and over again. There are some (like all four Rachmaninov's Piano Concertos) that I've listened to for years and just never tire of. It's a bit like enjoying a favourite whisky.
So with classical, I tend to still use physical discs. Partly to listen to certain versions of my favourite music that sound "the correct productions" whereas other versions of the same music are either too fast, too slow or emphasise certain instruments in the wrong place (wrong purely in my own mind of course).
And its with classical mainly that I've experimented with and thoroughly enjoy SACD and Bluray Audio. Some of the 7.1 mixes I have in DTS Master quality are truly dazzling. So I'm happy to reserve physical media for classical or the odd individual album not represented on Tidal (which is about half a dozen albums).
In addition to Tidal, I use YouTube more and more for music discovery (try Deezer Sessions, Wood & Wires, NPR music, Sunday Sessions etc.) and particularly intimate live recordings of artists I like. There are some beautiful live sets by The Staves, Phox, Benjamin Clementine and Jose Gonzalez for example.