[TheCoreh]

Information density is not hampered by the presence of proper negative space, on the contrary, using the right amount of negative space actually allows for very information dense layouts to still be readable. A good example is a traditional paper phone book

[inetknght]

What you define to be proper is likely not what I define to be proper. It's certainly a context-sensitive opinion.

The amount and location depends on what you want to do. Yes, just like a phone book, it needs whitespace. A notification window is not a paper phone book though. A paper phone book typically has a lot less whitespace than we're discussing here, so I'm not even sure if you're agreeing or disagreeing or trying to point something else out.