On my 24" monitor, you body text feels immense (at 1920x1080) and I have to scan my eyes left and right too much - annoying enough that I scaled the page to 80% to read it comfortably. It is important that column width not be too wide to avoid too much eye travel, while maintaining 60-80 chars per column.
This brings it down to normal text size comparable to a comfortable-to-read novel page size on my screen.
Comparing to WaPo, they unwisely have 100+ chars per line at that immense size. I've stopped reading the site at all because the balance of the width and font size combo is too much work. Most of the others have wisely kept to 60-80 chars per line, and scaling works to read them, but all feel a bit too large.