[kllrnohj]

You can find tons of used 10-40Gbps NICs on ebay for $50 or less. For a simple point-to-point connection with both sides having PCI-E slots that's going to be easier & cheaper to set up than thunderbolt will be. It'll also be more reliable & more practical since getting 40Gbps over Thunderbolt requires extremely short cables, whereas you can get DAC cables for 40Gbps QSFP or Infiniband up to 7M or so. And there's no confusion around what the cable can actually do, unlike the nightmare that is finding the right USB-C cable with the right signal integrity requirements at the right distance for what you actually need/want.