From the article you linked to:<p>&quot;At the end of 2015, the combined market share for IE8 (8.95 percent), IE9 (6.67 percent), and IE10 (4.18 percent) was 19.80 percent,&quot;<p>Sure, use flexbox exclusively if you want to push away nearly 20% of visitors. Also notice how the older of those browsers has the highest single percentage of use, and reflect on what that might mean about how likely those users are to upgrade.<p>I prefer the more customer-centric method of looking at what browsers my customers use and supporting them, rather than the more developer-centric view of &quot;X is hard, I don&#x27;t want to do X anymore and it&#x27;s no longer supported anyway so there!&quot;.<p>By all means keep an eye on the browser usage for your audience and drop active support for older browsers once they fall below a certain percent, but don&#x27;t take another company&#x27;s actions as a license to screw over your (hopefully paying) customers.