G'day jdporter,

I'm reasonably certain that the "flex" to which Lady Aleena refers, is the W3C's "CSS Flexible Box Layout" module. If you look at the CSS listing (top, right-hand panel) in the "new code", you'll see:

...

div#title {
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
  ...
}

...
[download]

This CSS module is a work in progress. It does seem to have stalled close to two years ago. This may affect the choice to use it. From the "Status of this document" section:

"... This document will remain a Candidate Recommendation at least until 19 December 2018 in order to ensure the opportunity for wide review."

...

"Publication as a Candidate Recommendation does not imply endorsement by the W3C Membership. This is a draft document and may be updated, replaced or obsoleted by other documents at any time. It is inappropriate to cite this document as other than work in progress."

My intention is not to dissuade usage — I've certainly used plenty of W3C's Candidate Recommendations over the years — but I felt it was important to advise the current, non-stable status of this CSS module.

For what it's worth, I don't mind the general direction of this proposed change; although, I preferred what I saw yesterday, to what I'm seeing today.