I have two MBA's one for me, one to my wife, I also have to keep a lenovo T60P due to some video cameras that I have in my house, which I hate, but I will not purchase an Imac to replace it. I also was "given" a Dell e4300 from work, and since I work from home I need to keep it as well.
Next week I am on my way to Amsterdan on a KLM flight that has no power ports except in Business (mind you 4K to upgrade, not doing it), and I resorted to my MBA, a Hypermac extended battery, and several movies and tv series to watch on this 12 hour flight each way. This morning I found out that I can also buy a book and not carry extra weight by using the Kindle application. So, now I have movies, tv series, songs (I have an Iphone as well), and books, in a small package that is almost the same weight of the Ipad (a pound is not a lot of difference), and if you would throw the book that I am leaving home in the equation I am carrying less weight, and I have a full featured computer to work with.