Ditto. Retina MBP and an older 11" Air and 10.9 has been solid. I never have to reboot either of them except to do some updates. I've had more issues with hard

Ditto. Retina MBP and an older 11" Air and 10.9 has been solid. I never have to reboot either of them except to do some updates. I've had more issues with hardware reliability with Apple products than with software issues.