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Ethernet is a layer 1/2 standard, so it is technically it’s anything covered under IEEE 802.3.
But for most folks Ethernet is a copper patch cable and a copper port.
My comment was more directed at the unholy costs of copper SFPs and their heat when dealing with multigig setups.
I’m a network engineer, I always have a flashlight on me since I have to get into crawl ways to chase cables
I personally have an Acebeam E70 Mini because it’s high CRI and non-PWM.