Every PCIe 10G ethernet card I've seen has a heatsink on it, sometimes covering the entire card or even have little fans on the heatsink.
Expecting it to work full time in a laptop is a bit of a stretch of the heat dissipation budget.
Also, the laptop he is working has the AMD FP8 chipset - depending on how the ports are setup, he might only get 10G USB, if the ports are allocated to video instead.
A lot of this has to do with segmenting the market into high-end and low-end products.
When they were the underdog to Intel, they gave away lots of premium features to beat Intel.
Since they got more popular, AMD has been taking away features, or not upgrading old tech, from their desktop/gaming CPUs: Their DDR5 interface is gimped, being slower than Intel now, and still limited to dual channel. Their chipset link is still PCIe 4x4 the same as two generations ago.
If you want these features now, you need a server product.
Microsoft is also doing this, Microsoft Authenticator, no longer works under GrapheneOS for corporate creds, and coming in July they will delete any Entra-related IDs from your phone.
This sort of thing really annoys me. Part numbers are for use of engineers, not for the marketing dept. If you change the specs, change the part number.
Yeah, everything being black on modern motherboards might look cool with RGB lighting, but makes it harder to work on. I like the older green PCBs with white PCI slots.
I also lament the demise of color coded connectors at the back. I knew to plug my speakers into the green 3.5mm jack. Now everything is black, so I need to look at the manual again to see which of the 5 connectors is the right one.
In the early 1980s there were actually word processors for the Apple 2 which had a 40 column display (7 pixel wide fonts default) that gave 60 columns using the a 5x5 font in graphics mode. It was a selling point.
The hardware solution was to buy an "80 column card" that gave 80 columns of proper text, if your monitor could handle it.
It is a pity that the apps most business people use everyday, like Word and Excel and Outlook don't work in it (Excel 2010 is the last version that has Platinum status). It is interesting that these are harder to get working than games.