They may be classics, but are they wrong?
Yes, Apple has never targeted businesses, but they did target individuals professionnals at some point. Video and sound editors used to work on Macs, and now move to windows. It's a classic, but is it wrong?
I guess as always it will mostly depend on your use case.
However this recent announcement from IBM might emphasis the need to reconsider theses year old arguments to take accounts of new facts : https://www.jamf.com/blog/debate-over-ibm-confirms-that-macs...
Mac have never been "for Pro" if you go that way. So I guess it confirm that it's not the company that shifted it's focus, but maybe there is more potentials customers expectation of Apple going more "pro".