- Columns
- Allows variable height rows and don't need a fixed height to 'wrap'
- Flex
- Allows items to grow or shrink but needs a fixed width or height to 'wrap'
- Rows adjust to the height of all items so they're always aligned
- Can't align items along the main axis, can only provide a general rule like 'justify evenly'.
- E.g. can't say move this one item to the end.
- Grid
- Is very powerful but the more verbose and the main constraint is that items must align with a row or column track
- Can't have both automatic columns and rows, one or the other must be specified