I'm debating whether or not to start using CSS variables. They're wonderful gifts from heaven ... except that Internet Explorer does not support them and never will.
According to Net Market Share IE still (and inexplicably) represents about a third of browsers.
At what point is it safe to assume that old browsers can be ignored? Should I use their support life as a measure, or their marketshare usage?
The application I'm building supports the development and retail sales of ebooks.
Let me be more clear about the phrase "safe to assume." I'm a one-man shop and supporting a multitude of browser-version pairs is time consuming. Therefore, "safe to assume" means, "I'm going to tell people that I don't support that browser-version, please upgrade, sorry...." In other words, I'm trying to understand the impact of writing off market segments (e.g., people still using IE 9, etc.). IE is only my case example. In a sense, I'm looking to understand where I can turn away old-tech users without getting too many negative social media reviews.