The Recent production of new Intel processors inspired Lenovo to release three new workstations with unique characteristics. Among them is ThinkPad P52s, which is the first mobile workstation that has a quad-core processor and is executed in ultrabook design. In its turn, ThinkStation P520 and ThinkStation P520C have far more powerful processors inside, Intel Xeon W and professional graphics cards NVIDIA Quadro P5000/P6000 based on Pascal architecture.
Both ThinkStations are relatively slim, the thickest device is 175mm. ThinkStation P520C is suitable to be used as a desktop Ps or be installed into server racks. It also has a number of other distinctions from its little brother, P520: mainly it is graphics (Quadro P6000 vs Quadro P5000), maximum DDR4-2666 RAM capacity (256GB vs 128GB), and space for hard drives (6 x 3.5-inch, 6 x 2.5-inch, 2 x M.2 vs 4 x 3.5-inch, 4 x 2.5-inch, 2 x M.2. However, both systems can house any of Intel Xeon W processor, even 18-core Xeon W-2195.
Lenovo ThinkPad has something to amaze with as well. It houses Intel Core i5-8250U or Core i7-8650U, both are quad-cores, Quadro P500 graphics, up to 32GB DDR4-2400, 1TB M.2 SSD, 2TB 2.5-inch SSD, and 4K IPS display (full HD by default). At the same time, the thickness of the laptop does not exceed 20mm and it requires only a 65W power adaptor.
There is no doubt that this exceeds anything that Apple can offer at the moment. Additionally, it is significantly cheaper. Perhaps, it is time to sell your old Mac and get serious.