YMMV. I have bought fully-loaded mid-release-cycle Apple laptops for the last ten years, starting with the Rev. D TiBook. Each lasted for several years of heavy

YMMV. I have bought fully-loaded mid-release-cycle Apple laptops for the last ten years, starting with the Rev. D TiBook. Each lasted for several years of heavy use. At year 3, they started feeling dated, and at year 4, I generally replaced them.