I have a TIDAL account with a Scott Nixon dac so no hi-rez necessary. Do you think switching over to Amazon is worthwhile? Yes I have a Prime account.

I don’t know which Scott Nixon DAC you have, but if it is only decodes / outputs CD quality I don’t see why not. How you value the other factors related to streaming, I can’t say.

From the Scott Nixon site, for his newer DACs:

"The usb models are not hi-rez, but I really think most listeners don’t need it yet (or ever). For hi-rez I recommend the s/pdif models and a pro-interface or usb/spdif dongle that will output 24/96. The Chibi and TD2.2 will decode 24/96 and output 16/96. There are usb hi-rez models in the works, but will be 4 to 5 times the cost of these offerings."
Hopefully the added competition will result in lower prices from Tidal and/or Qobuz.

@big_greg  It will definitely be interesting to see how Tidal and Qobuz respond. Spotify and Apple also.
I think it's a usb version of the TD2.2. I've had it since 2006 and don't change equipment often. I think I'll be okay.
@digepix  You'll be fine. Either way (for Tidal and for Amazon) you will be limited to CD resolution. Share your findings if you sign up.