In NXT, if you create a list that filters on a Custom Field (a.k.a. Attribute) and that Attribute is deleted via Global Delete in database view, your list in NXT will become inaccessible, you will be locked out of the List, requiring the creation of a replacement.

Compare this to Query in RE7. If the Attribute is in the criteria for a Query and the Attribute is deleted as above, the Query can still be opened and amended accordingly. The missing Attribute simply has an alert along the lines of 'field removed' in the criteria, which can easily be amended.

This should be replicated with a 'Missing Filter' alert in an NXT List, should something be deleted in database view, so that you can still open the List and amend as required.