Important caveat that the author neglects to mention since they are discussing laptop CPUs in the same breath:

The limiting factor on high-end laptops is their thermal envelope. Get the better CPU as long as it is more power efficient. Then get brands that design proper thermal solutions.

You simply cannot cram enough cooling and power into a laptop to have it equal a desktop high end desktop CPU of the same generation. There is physically not enough room. Just about the only way to even approach that would be to have liquid cooling loop ports out the back that you had to plug into an under-desk cooling loop and I don't think anyone is doing that because at that point just get a frickin desktop computer + all the other conveniences that come with it (discrete peripherals, multiple monitors, et cetera). I honestly do not understand why so many devs seem to insist on doing work on a laptop. My best guess is this is mostly the apple crowd because apple "desktops" are for the most part - just the same hardware in a larger box instead of being actually a different class of machine. A little better on the thermals, but not the drastic jump you see between laptops and desktops from AMD and Intel.

* Me shamefully hiding my no-fan MBA used for development... *