About every 4-5 years I do a ton of research and drop $2-$3K on a game rig. I have an i7 and 32GB of RAM build in 2012 according to Newegg that is laughing at everything I throw at it. I'm starting to get less than 60FPS at 1920x1200 so it is time to slap in a video card or two and another 10TB of storage for the astronomy camera stuff and I'll be good for at least 2 more years. MAC hardware is expensive by design to prevent people from messing with it. One of the reasons that MAC machines are good is that they are all the same hardware, making it easier to do driver support, as well as tech support. But as a guy sitting here with the two sides off the game rig playing with the cable runs to make it look nicer and easier to access for when I get the new video card(s) next month, I'd go bonkers on a closed ecosystem like MAC.
There was a good one for a while after the switch to Intel. Mac Pros used nVidia and ATI video cards. There were PCIe soundcards you could throw in there. But yeah. There was about a 6 year period where you could legitimately run Mac hardware as if it were PC hardware, and that era is done.