Getting tired of these articles. Fundamentally, if you're a professional who needs these features, then I'd say that the odds are high that you already know that you need the new machine.

If your day-to-day work is editing 4K video with ProRes, or photography, or developing in Xcode, then you already know where your pain points are and whether or not you'll benefit from a new machine with more high-performance cores, or graphics cores, or dedicated decoders, or from a machine that easily supports multiple monitors, or simply from a lot more memory.

Further, if you're one of the aforementioned professionals then the price differential is also irrelevant. If that machine can shave a minute off a each and every build I do all day long, then I'd gladly pay the price. Time is money, and at that rate it's probably paid for itself in the first month.

"Professionals", oddly enough, tend to recognize that professional tools cost money.

Finally, opinions as to whether or not you personally think the design appears "dated" is pretty much irrelevant to that decision.