Concerning the presentation of this article, rather than its contents:
Source Sans Pro 300 is too thin for body text on most platforms. It’s tolerable on Apple platforms with high-DPI displays due to their stroke thickening (where they essentially ignore the font author and do their own thing, though you could also argue that it’s just a form of gamma control), but on other platforms like Windows it’s much too thin, to the point that on many low-DPI monitors it’s genuinely painful to read.
Be very careful in general when using light font weights for body text. 400 is a much safer option.
Source Sans Pro 300 is too thin for body text on most platforms. It’s tolerable on Apple platforms with high-DPI displays due to their stroke thickening (where they essentially ignore the font author and do their own thing, though you could also argue that it’s just a form of gamma control), but on other platforms like Windows it’s much too thin, to the point that on many low-DPI monitors it’s genuinely painful to read.
Be very careful in general when using light font weights for body text. 400 is a much safer option.