Thanks - you certainly made a good point. But there's one problem with enforcement of explicit sort and this the problem I constantly have with my projects.

By default, most tables that I have are sorted by "created_datetime" but this is the column that won't be shown to the end-user since most of the time it is redundant information for them. If we're implementing explicit sort, I need to add an additional column which would be useless to them.

Having the ability to easily reset back to default sort makes everything so much cleaner as an end-user (for me). I won't have to experience another "How the heck do I go back".