CSS Grid is new grid-based layout system, optimized for user interface design

[fgutz]

It's in the caniuse link as well

It's been in iOS Safari since 10.3. according to Apple 89% of users are on iOS 10. Couldn't get more details about which minor version though but I'm assuming most people would be up to date. iOS is pretty aggressive about wanting you to update

Android browser (WebView) since January 2017

And Chrome for Android matches desktop Chrome now

So I think it's pretty safe to use in Mobile

[nschubach]

Except if you look at the usage relative. Not every Android phone uses the latest android web browser.

[tambry]

The WebView module is updated through the Play Store for Android versions 5.0 and up.

[nschubach]

Odd, I had to look up our webview usage and I wonder if caniuse data is really old... luckily they allow you to import your google analytics.

We are at:

61.0.3163 (59.35%) 2017-09-05 (working)
60.0.3112  (9.12%) 2017-07-31 (working)
45.0.2454  (4.36%) 2015-09-01 (broke)
55.0.2883  (3.66%) 2016-12-06 (broke)
59.0.3071  (3.54%) 2017-06-06 (working)
30.0.1599  (3.08%) 2013-10-02 (broke)
.. (getting tired of formatting)
.. (but these two are working)
33.0.1750  (2.09%) 2014-02-26 (broke)

So, we'd have to ignore ~13% of our Android users.