You are going to regret it on the new models. Before it was possible to justify the purchase because you could upgrade the ram, and hard drive yourself (fairly easily) and it wasn't an issue. But now the ram AND the m2 drive is chip soldered directly to the board so no self upgrades. So unless you can afford the most powerful one there, you will be gimped early on, go with Windows at least then you have options to get a laptop that is still upgrade-able on your own unless you get a ultrabook or something.