I assumed the 21 would have a graphics card, so it is very dissapointing. I was confident of being able to sneak a 21 on flights, no chance with the 27. Instead I will have to buy a short term 27 for greater cost and sell when move, which is probably when Apple will upgrade the 21. At least I won't be worrying if I can get a 21 on a flight, plus the 27 is big enough to double as a TV for 4K videos.