Apple is no longer what you would call a 'Computer Company' as many old school types would like them to be.
They are not interested in getting the public interested in the fastest desktop machine.
They can't win that battle, never have done, never will. it's a lost race for them.
They are concentrating on the area now that they can win, or stay near the top in, the mobile fashion electronics industry.
Being cool with the kids, appealing to the young generation with cash to waste.
Sure they will knock up the mac pro, again designed to look cool above all else, but that's only really been built for one task and if that's not your task they screw you.
Apple could in an instant make was many old school people want, and ask for, but they won't they are not interested and that's not the direction they are going.
If you like 'Proper' computers to do something with, be that entertainment or productivity/business, then do what the vast majority of the world have done for years and still does today. Use a PC.