New ask Hacker News story: Ask HN: For simple layouts, do I need CSS Flex or Grid?

Ask HN: For simple layouts, do I need CSS Flex or Grid?
2 by swidi | 0 comments on Hacker News.
For a simple one-dimensional blog layout (header -> navigation -> content -> footer), do I need to use these new CSS APIs? Will CSS's default behaviour continue to work in the future, or are all sites expected to use these new systems?