Professional is being able to perform a task within budget and within a period of time.
The Macbook Pro that is 13 inches, with 8GB RAM, and 256GB SSD is not professional, the MacPro is professional, as it can be upgraded, parts replaced without sending out to the Apple store for updating.
I should be able to purchase, replaceable RAM, hard-drives, and self install without sending the device out to Apple and waiting 6 months for RAM to be installed.
The Air is consumer, let that be for them, video editing is not always done in the office, sometimes it is done on the road, stuff happens, RAM fails, and now if that happens, I could with my older mac, buy RAM, shove it in, be on my way, editing..
So how this new soldered version is professional is beyond me, it is stupid and the team that says it is, is not right in the head, that includes Mr Ive, who has demonstrated a clear loss of function in the design of the ipad mini...
If professional cameras have interchangeable lenses, then laptops for professionals should have interchangeable hard drives and RAM.