It's well known now that Apple isn't shipping modern desktop Macs for the creative and technical professionals. Notably, Microsoft and HP have seized on this gap in Apple's product line and have moved in with capable solutions designed to be both powerful and aspirational.
Small; beautifully designed; lots of purchase options; tremendous technical detail available; can drive four 4K displays; supports Xeon CPUs; easy open lid; supports up to 32 GB RAM; boot SSD on M.2 bus; also certified for selected Linux OSes; certified for 20 CAD related apps; remote power on,...
Maximum RAM is 32 GB