Am I missing something vs anything

Am I missing something?

This is more widely used, colloquial, idiomatic and grammatical as well. For example:

• "Wait a second, am I missing something here?"
• "Am I missing something if I don't travel abroad?"

Am I missing anything?

This is equally idiomatic and grammatical. However its usage is (quite) low as compared to am I missing something.

• "Am I missing anything if I don't socialize?"
• "Am I missing anything if I don't accompany you to the wedding ceremony?"

However I feel, something refers to a small range of objectifiable things, whereas anything indicates a far bigger range.

missing something vs missing anything