FWIW, I don't recall ever having to replace a modern-style Mac power adapter. I had one of the early first generation Magsafe ones fail, but the later ones of t

FWIW, I don't recall ever having to replace a modern-style Mac power adapter. I had one of the early first generation Magsafe ones fail, but the later ones of those have lasted years, and so far all of the second-generation (thin) Magsafe ones are fine too. Pre-magsafe I went through a lot.