Goes on working for years without needing expensive support. Both hard and software are rock solid. More than adequate for office tasks.
Can't think of any. Lack of IT support hours more than offsets initial cost of purchase.
The Air isn't aimed at the "lets count features" crowd. Instead, it is a rock solid workhorse that goes on working year after year after without as much as a hiccup. The Airs in our office get used by Account staff, financial staff, events teams and culinary teams. They take heaps of abuse and keep on ticking.