• 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