It's surprising how rarely I even consider using CSS grid and every time I do, I still figure out a way to do it with flexbox. Now this depends of course on what you are doing, but for simple things, and you should keep things simple more often than complicated, flexbox is still as valid as it was before.

Maybe my layouts aren't as fancy as those who know how to neatly proportion their boxes with CSS grid using golden ratios, but I'm quite satisfied that they work and are easy to understand for anyone who knows a thing or two about flexboxes. Sometimes I might have to add an unnecessary wrapper, I admit that. But oh well.