The MacBook Air with Retina Display 2018 earns a 3 out of 10 on our repairability scale (10 is the easiest to repair):

Many components are modular and straightforward to access—including the ports, fan, and speakers.

Apart from the pesky pentalobe screws, this laptop opens about as easily as any.

The battery is secured with a combination of screws and repair-friendly stretch-release adhesive—but you'll have to remove the logic board and speakers for access.

The keyboard is integrated into the top case, requiring a full teardown for service.

Soldered, non-serviceable, non-upgradeable storage and RAM is a serious bummer on a $1,200+ laptop.