I have several 48 port 10G copper switches in my computer room with 40G uplinks. Dell OS9 jobbies. They are a bit noisy, but they don't actually run that hot. I also have some HPE 1G 48 porters and they run roughly the same temperature.

I used to daily drive Gentoo on my laptop. Lovely in the winter!

Yes the noise is my main complaint for my 10G switch. I didnt expect that high frequency part.