I'm not really interested in dropping thousands of euros on the latest gaming hardware. I'm not in the pointlessly blinking leds equipped PC market. And I'm done building my own PC after having to replace the power supply in my last effort three times.
I do tend to have up to date mac hw. For me the whole point of that is buying one and then using it for 4-6 years. I actually have the MBP 15" from last year with 16GB. It's not great for gaming though. My four year old imac 5k still gets better framerates in things like x-plane. Both have the issue that they run quite hot when doing anything 3D and cpu intensive. My imac needs to emulate a vacuum cleaner just to keep it from throttling cpu and gpu.
My imac 5k is coming up for replacement somewhere in the next two years. I'm probably going to drop around 3-4K on whatever replaces it. I'd totally consider something with an external GPU. I actually like the form factor but would spend money on an external GPU for casual gaming and VR.
I'd prefer something that focuses on just cpu/memory/ssd and then plug in storage and gpu via some cables. So, this is going the right way.
Apple should focus the next mac pro around this concept. They tried with the previous one but then messed up by soldering the GPU in, which turned out a deal breaker since the whole point of mac pros is 3d graphics. So, simply ship something with plenty of ports and CPU sockets and sell GPU, Storage, screens, etc. separately. CPUs are barely evolving anyway. I got about a 35% build speed improvement by replacing a late 2011 MBP with a late 2017 one. Both were quad core i7s. Seriously underwhelming. And yes, I max out 4 cores with my builds.