latest version, not mainstream as in a lot of browsers support it.
Sorry, didn't mean to be snarky. Chrome 57 supports grids, but I am aware that support for grids is far from common. Hope you could enjoy the article anyway.
Telling your readers to suffer is not very friendly regardless of intention. A more apologetic phrasing would not feel so provocative.
You're right, that was glib. I have put up a proper warning message. Thanks for your feedback.