I've been using my 2007 Macbook since I got it over 8 years ago. It still works, but due to software limitations it's time to upgrade. I'd like to get as long as possible out of my next Mac too. I'm pretty sure the bottom-of-the-line Air would meet all my needs.* But will it last me for the next 8 years? I know I don't need the power of a quadcore 15" Pro now, but is it worth the money in the long run if it remains viable for years longer than the Air? Should I spend the money now and reap the benefits for years to come? Or would I be wasting money on speed and features I really don't need and never will? What's the sweet spot for long-term value? *My main uses are web browsing, Netflix, Spotify, DVD's, email, LibreOffice, GarageBand recording, and minimal photo editing. I prefer laptops because I like to be able to work in different places around the house, but I rarely need to travel with my computer, so I'm not concerned with size or weight. A bigger screen would be nice for watching movies, but I could also take the money I saved and buy an external display for that purpose.