Updated my streamer so do I now have to burn it in. Denafrips dac required it,

I felt my Streamer and DAC improved after a few hundred hours use, but regardless, they will break in or not as you use them, so just enjoy and come to your own conclusions in a month or so...it's a petty debate as everything breaks in regardless...

And you don’t need your amp turned on to break in DAC and Streamer…

If you've got new electronic parts, the sound is very likely to change subtly over time. 

I built my own amps from Nelson Pass designs and was able to compare two boards with identical designs, but with higher-quality parts in the new board.  At first I was so disappointed with the new build because I spent so much money, time, and effort on the parts and it actually sounded worse than the original.  Two weeks later it was leaps and bounds better, as I had originally hoped when I undertook the build.  After that experience I'll never doubt the reality of burn-in again. Or parts quality for that matter.