Qobuz (best) and Tidal can sound as good as CDs, stored files or vinyl given the right system. The sound you get is really dependent on all your components.
Your system is a sum of its parts. I have found that with careful choices topically an optimal system will have all components with roughly similar investments… so streamer = DAC = Preamp = amp.
That said, if I were going to invest more in something it would typically be the preamp. It really is pivotal in setting up the sound.