I have--good stuff, but I could not justify having two music streaming services.
If you are using you phone, the issue is not the quality of the service (i.e. from Tidal to your phone), the weak link is the Bluetooth connection between your phone and the car--that audio stream will get compressed and you'll lose audio quality. Even if you had high-resolution radio files on your phone, they would still get compressed as they traverse Bluetooth.
If Tesla does offer a native client in the car, it can solve that issue, but there is a different concern. Since Tesla is paying for the bandwidth the car uses, they have an incentive to throttle down the bandwidth made available to apps like Slacker, Spotify and Tidal, so you still end up with compression and loss of quality, just in a different part of the listening chain.
All that being said, if you are rocking out to Taylor Swift while your are driving, you'll probably not notice, but if you want to do some critical listening, nothing beats audio files on a USB stick.