Do I Really Need a Dedicated Streamer?

OP, just stay with what you have. Spend extra money on something else entirely for which you know for 100% certainty you are getting something that makes sense to you.

I upgraded from a Squeezebox Duet to Chromecast Audio to Bluesound Node X and to the Auralic G1,1. When streaming from Qobuz, sound quality appear almost as good as when listening to my MD Étude FM tuner. I also use a Chord Qutest and a McIntosh integrated amp.

No, you don't need one, and no, quality will not increase. Even a $7 Apple DAC's noise level is beyond human hearing.

@jssmith If you don't mind me asking, what streamer or streamer/dac are you using these days?  I had somebody get pretty upset (not here) when I asked them what they were using after they had a similar take on digital streaming gear.  They had said it doesn't matter and any cheap one would do and when I asked what they had, they had a fairly pricey streamer.  Seems a bit hypocritical but what do I know?

Anyone who says a cheap streamer sounds just  as good as anything else hasn’t heard a good one or doesn’t have the system or ears to be able to tell the difference. The difference between a Wiim or Node and something like an Innuos Zenith or Aurender N200 is night and day, and if you can’t hear that level of difference, we’ll, that’s just sad. Ignorance is bliss.