MacBook Pro with Retina Display 13" Early 2015 Repairability Score: 1 out of 10 (10 is easiest to repair)

Proprietary pentalobe screws continue to make opening the device unnecessarily difficult.

The battery assembly is entirely, and very solidly, glued into the case, thus complicating replacement. Additionally, the battery covers the screws holding the trackpad in place, meaning it's impossible to replace the trackpad without first removing the battery.

The Retina display is a fused unit with no separate, protective glass. If anything ever fails inside the display, the entire ($$$) assembly will need to be replaced.

The RAM is soldered to the logic board. Pay for the upgrade now, or be stuck with 8 GB forever. There is no chance of upgrade.

The proprietary PCIe SSD still isn't a standard drive. Cross your fingers for future compatible drives; for now, you're stuck with what you've got.