We use phone comments to indicate a number is a direct line for the Assistant. If you look at a record in NXT you are not able to see the comment - even if you edit the contact information. A gift officer has no way of knowing who they are calling. The comment is visible in database view.
I agree the comments field is a place to put very helpful info, but that is only viewable in the database view. All of our officers are exclusively using RENXT Webview & I'm very happy about that. The more useful the webview is for them the better!
I am also using "Phone Type Comments" to store useful info about all of our org's urls on a record for our org. But, in the Web View those comments don't appear with the Online presence links.