I fairly doubt my laptop has 10G onboard NIC… especially that on laptop side it’s negotiated to 1Gbps

This might help You:
Oh okay. I read this bilion times in the past yet somehow I still forgot about this 1G sfp+ thingy.
Still I believe that’s not how autonegotiation is supposed to work XD
I think they are saying that auto negotiation doesn’t work, between 1Gbps and 10Gbps modules…