Re: Because ... it’ll just work : Nope
Actually thinking of upgrading to a 2015 15" MBP so I can install the latest OSX without witchcraft
I think the 2015's will be losing support from next year. Not 100 % on that but there was a timeline recently published. So worth checking this before you buy, if access to the newest OS release is important to you, though I'd agree that for many things it isn't.