<p dir="ltr">Andi,</p>
<p dir="ltr">You know my take on this. ;)</p>
<p dir="ltr">I think a MacBook Air is fine for Ruby and Docker based development, so long as you fill it to the brim with RAM and SSDs. (Docker for Mac significantly reduces the resource requirements of Docker.) Retina screens are nice though.</p>
<p dir="ltr">I guess it comes down to how much weight you want to carry around.</p>