Board Thread:News and Announcements/@comment-5645428-20171019063248/@comment-5645428-20171020015719

CSS variables were discovered years ago but were only adopted recently when it was decided that overall browser support was high enough. I refer to caniuse.com for this information. Currently, there’s about a 75% usage rate and support for all major browsers except of course Internet Explorer. For the benefits it enables, that is sufficient.