but in the last macbook pro and macbook air is possible change the ssd or not?
You could before, but based on the picture of the logic board from the keynote, I doubt it on the new one.
[doublepost=1541203429][/doublepost]
Honestly it'll do fine for office work, browsing, music/ iTunes movies and the like, and that's really it's intended purpose. If your needs are more demanding (moderate video editing?) the nTB Pro offers a good chunk more power for roughly the same money (particularly if you take advantage of the near continuous small discounts on the pro). Arguably the pro is the better value for most people, unless you really want the wedge design, touch ID and (assuming 12h is accurate) ~3-4h more light usage battery life (this is probably largely negated if you're using the machine even moderately anyway as when you start to push it, I'm sure either machine will start depleting a lot more rapidly).
Please stop spouting lies.
The new MBA is faster than than the 2017 13" nTB MBP.