Do you use new features in moderns browsers, but blocked by IE, in production?

A couple of days ago there was post here on the use of web components in the next version of chrome.

Fact: Web components are not supported by IE.

Fact: IE doesn't have a streaming update support, its version only bumps when a new Windows comes out (if it does).

Likely fact: The current alive versions of IE will have a total share of least 20% of the market for the next 2 years.

Likely conclusion: In practice, you cannot use a 2 year old technology in production, because IE blocks it by hijacking a noticeable chunk of your visitors.

You can generalize this by replacing 'web component' with another technology, and even replacing 'IE' by another browser (firefox recently has been showing some IE symptoms).

Do you use these blocked features in production? By production I mean a real world project with real users, not one of those 'Show HN: My weekend pet project see how pretty it is' kind of projects.

Why the 90s style of 'you browser doesn\'t support my web app' is not okay?