The MBA has Thunderbolt 3 ports good for "up to 40 Gb/s", so all you need is an external box to convert that to 10gig ethernet. Sonnet sells one: it weighs 3 lbs, has a 60W power adapter, and costs $500. It's the perfect accessory for your 2.75lb, 30W, $999 laptop!
Even better! So you'd basically need a 10Gbps connection. I highly doubt many macbook air users have a 10Gbps connection, and are connected with a thunderbolt -> ethernet. I also doubt you'll find many cloud providers that can saturate that anyway.
What kind of Internet connection do you have?