How about displaying data in rows and columns in a accessible and easily styled way, without having to rely on JS and your own CSS to replicate a table? How exactly would you do that with HTML and CSS without using tables? Using flex and grid for those purposes don't make much sense unless you care about design above all else.

<table> just gives you so many good defaults (semantic structure, accessibility, column styling, column alignment, keyboard navigation) for free compared to using CSS to create your own table, that I'm not sure why you wouldn't use <table> for tabular data.

Of course, if you need masonry, card grids and so on it makes sense, do actual layouting with layouting tools. But thankfully <table> hasn't died just yet, it's still better than CSS for many use cases.