TL;DR: If you use the native font stack (the default in Bootstrap 4+), check the numbers displayed in tables, especially on Apple’s platforms. Photo by Jen Theodore. A new problem Many of the content creation frameworks that support HTML output in the R world are getting upgraded to Bootstrap 4+: Shiny and R Markdown can use bslib to customize Bootstrap version; The three-column Bootstrap style for bookdown projects; The pkgdown …