What is the main review concern when grid-auto-flow: dense backfills a hole with a later …

What is the main review concern when grid-auto-flow: dense backfills a hole with a later interactive item?

1. Visual order can diverge from DOM, reading, and sequential focus order.
2. The browser permanently rewrites the DOM to match the grid.
3. Dense packing disables keyboard focus for every grid item.
4. Dense packing always reduces the number of explicit tracks.