I have ten gigabits throughout most of my house, and you're right: copper is not happy pushing ten gigs.
My 10 gigabit thunderbolt dongle weighs about a pound, and I think 90+% of that weight is just heatsink. If I've had it plugged in for awhile, if I accidentally touch that dongle it actually hurts because it's so hot. I cannot image that much heat is good for, well, anything.
I have another Thunderbolt dongle that has an SFP+ module, so I ran a fiber line from my switch to my computer, and that runs considerably cooler. That's what I use nowadays.
My 10 gigabit thunderbolt dongle weighs about a pound, and I think 90+% of that weight is just heatsink. If I've had it plugged in for awhile, if I accidentally touch that dongle it actually hurts because it's so hot. I cannot image that much heat is good for, well, anything.
I have another Thunderbolt dongle that has an SFP+ module, so I ran a fiber line from my switch to my computer, and that runs considerably cooler. That's what I use nowadays.