I was in ATC training in the 90s and this was discussed among teachers and ATC personell. The common saying was that pilots would disappear from cockpits before ATC personell were removed, at least from tower control. There are typically three kinds of ATC: Tower control, approach/departure control and area control for controlling planes when cruising. I haven't followed this in years but my impression is that better monitoring equipment allows for fewer area controllers to control bigger areas. I believe area control is the most likely to get automated but this is quite a guess. Approach control is about using radar (or no radar, procedural approach control is a thing) lining up planes to land on a runway. The planes are handed over from approach to tower control when the plane is on final approach. There is also ground control for taxiing on larger airports. But, not least. Do not underestimate the value of having trained personell using radio to great effect. Any belief that modern touch gadgets are better than radio is silly. Humans are also very capable at speaking while performing advanced tasks.
CSS Grid was the first specification for page layout using rows and columns (grids) since the creation of the web. Everything else prior was a compromise.
Flexbox is for laying out rows or columns; while you can do some limited page layout, that's not what it's designed for. Just like tables and floats weren't designed for page layout either.
Another way to grok this: CSS Grid is for two dimensional layout and Flexbox is for one dimensional layout.
Flexbox and CSS Grid were designed to work together, each doing what it was designed to do.
