In my country there are still many high profile sound engineers that record and mix live and studio with their 1,1-3,1 Macs, on OS X Snow Leopard to Mavericks. They have invested great deal of cash in their racks and onboard gear/cards that work with those Macs and old operating systems.
Who am I to tell them that they should upgrade 'cause they're using ancient gear?!😉
Edit: But, yes, for "everyday stuff" you're better off with cheapest Macbook (Air?) you could find.