I switched from Aperture to Lightroom just before Apple stopped development on the app. Never used iPhoto/Photos. Still use the original versions of Pages/Numbers/Keynote, although the
new' ones are installed and updated as needed to stop the 'nagging'.
Of course, you are free to use whatever hardware/OS/software you want. On the other hand, most software developers, whether Mac, Linux or Windows, always try to take advantage of the latest cpu offered by Intel/AMD/etc. I'm not sure you can blame Apple or any Windows computer maker for bringing out an updated OS.
The simple truth is, "Apple Computer" no longer exists. Just like Microsoft, it is trying to make all its OS work on all its hardware. MS doesn't even make hardware, so they have a much more difficult task.
Lastly,in my opinion, Apple has never been known as a computer for all professionals or professions. It usually is a battle to get a company to allow some one to use a Mac. There are exceptions in small areas, particularly the Arts. Frankly, I think most places that use lots of Macs do so because of its ease of use (including it's lack of successful hacks/malware), not its native software (iTunes, Photos, Pages, et all). I have many more "third-party" apps than native Apple ones, even in the Utilities category. In my opinion, if it weren't for these non-Apple devs, the company would have died years ago.