My rule of thumbs is: Use flexbox unless it truly is a grid or repeating rows + "I wonder if a flexbox can be used ... ah yes it can." Flexbox is just made for responsive layouts. It is very good.

"flexible divs side by side" sounds like something which can be generated in many ways, From display: inline-block, over float:left, col-columns, flex layout, to a grid based layout. Can what you desire be created in, for example, https://grid.layoutit.com/?

> Just do a google search for flexible divs side by side. Start with two. Then switch to five. Tell me the solutions that work well.

I did like you asked. The first search result on google is a question on stack overflow. And the first comment provides an example that looks very much like flexible divs, side by side, between two and four based on the width of the container.

https://stackoverflow.com/questions/60615826/two-divs-side-b...

What didn't you like about the solution in that comment?

flexible divs side by side is trivial with both flexbox and grids. Far, far, far easier than prior to flexbox.

don't search, ask an llm. Ask it to keep it as simple as possible and have it explain the tags you've forgotten.