Mac GPUs supposedly being fastest thing on Earth obsoleting everything NVIDIA is just pure marketing. It was just faster once than some midrange laptop NVIDIA, which conveniently wasn't explicitly marked as different chip sharing the branding with the desktop variant(oof).
The real benefits to going Mac is its quiet and discreet, high wife/CEO acceptance design, and their huge GPU-assignable shared RAM.
If you're okay with your desk being the wing top of a flying airplane, and 3M Peltor or David-Clark is your favorite working time headphone brand anyway, then your build will be faster and cheaper than a maxed out Mac Studio.
For me the operating system (and ecosystem in general) is one of the biggest reasons I use a Mac, but the unified memory pool is a benefit too. I am still distraught about the gaming situation though.