correct.I do not believe that there is any significant difference between the longevity of Macs now and the longevity of Macs of earlier. If anything, Macs now offer better bang for buck then they did few years ago. Now, for the $2000 you get a state of an art display, a battery that can easily last 5 years, a super-fast array of external connectors and one of the fastest SSDs on consumer market. My first MacBook Pro was the same price, but it didn't really spot anything state of the art, except build quality.
They just changed one thing: user accessibility .
I'm quite ok with that. I'd like to have RAM expandable, but I'm planning to keep my MacBook for 3-4 years and 8 Gb will be fine for that.