Fake small caps are worse than just all caps — small caps are not just
smaller caps. They must specially designed. It is 2019: most browsers
(except Edge and Safari) have proper support for OpenType small caps.[1]
Additionally, replacing all caps in text by small caps helps readability
inside long texts. However, this was being applied to the whole page,
including menus. This will restrict small caps to 'content' sections.
More reading:
* Bringhurst, R. (1992). The elements of typographic style. Point
Roberts, WA: Hartley & Marks.
* Butterick, M. (2013). Practical Typography. Reference section online:
https://practicaltypography.com/small-caps.html
[1]: https://developer.mozilla.org/en-US/docs/Web/CSS/font-variant-caps#Browser_compatibility