[retrochameleon]

Frankly, I would probably just use flexbox for any centering use case. It's simple, fast, and straightforward. As far as I understand, flexbox has a pretty well optimized implementation, so it's not really a performance concern to just throw in another flexbox. Why would you not use it?

[jfengel]

I often don't understand what flexbox is doing when what's inside is itself complicated. I think that fits-content might help, because I haven't tried that.

[retrochameleon]

https://css-tricks.com/snippets/css/a-guide-to-flexbox/

I honestly don't understand why people would find Flexbox hard to understand. Yes, there's a little bit of new terminology, and there's a reason for that. There is a main axis whose orientation can be changed, which affects the interpretation of other properties you use, but most of the time, you won't change it.