[dschuessler]

You seem to assume that old CSS properties can be substituted for new ones. But as I said, to my knowledge this isn’t possible in most cases. Can you give an example of two CSS properties where 'either is fine, but only one should be used'?

Or do you mean something else altogether by 'CSS attributes'?

[QuadmasterXLII]

The specific case that inspired this comment was a random mix of margin and gap