I'm not sure about SREs - it probably depends on company, but where I work, if you aren't oncall, you develop projects similarly to a SWE - so you can still think about work after you clock out.
I guess it's not serious in this case, as streaming audio is not very CPU-intensive, BUT I noticed that when I trained my ML model (basically 100% GPU usage) I could hear a noise in my M40Xs. I guess it's some MOBO/GPU insulation issue.
This is so much time that humanity (if still alive) could advance technology so much that we would be able to workaround heat death too. This is borderline sci-fi, but I believe we could bend almost any known laws of Physics with enough advancement.