I'm going to "partially" side with the author on this one, but with a big caveat: a lot of displays simply don't get dark enough to make light mode palatable, especially in low light conditions.

With high quality displays that have good contrast and backlight controls that go "really far down", I prefer light mode UIs nowadays.

But, only a few of my displays can dim enough to make it work in dark(er) rooms. CRTs were great at this, with the brightness control for the raster. LCDs generally aren't, though the fancy "FALD" backlight in my macbook pro does get dark enough to make light mode work well in dim spaces.