@juliancwirko neither a mac nor a windows system is in no way as powerful/flexible as a linux system. Elementary is also very elegant, but that left aside, you will not get that kind of flexibility and wide variety of choice that you do have now from a mac.
That being said, macs are really good hardware, macosx is really productive once you accept its terms (I mean c’mon steve jobs (rip) was as arrogant a bastard enough to say that we were holding our (sexy as hell) iphones wrong!!!).
The reason you should buy a mac is you’d want to do serious osx/ios development. You theoretically can do it without a mac, but practically, you just can not.
I know a lot of people who have bought their macs and set up dual boot to (primarily) ubuntu soon afterwards.
But, if you are not customizing, trying out a lot of apps etc on your elementary, you actually might feel at home with macosx because elementary’s original design roots and decisions align a lot with that of macosx’s.