The current Artist Sort Name guideline has the following:

Harry Connick, Jr. has sort name "Connick Jr., Harry"

This has several issues.

1. That is not the current sort name for the linked artist.
2. This is not going to produce the sort order that people expect. That is the artist would not sort between "G" and "I" of other artists of the same familial name.
3. This is not the actual practice that I've seen in use for a long time.
4. The "Guess sort name" button never produces this kind of result.

I propose an update to the guideline to reflect actual practice, which is to say, recommend "Connick, Harry, Jr." for the example artist. I'm certain this was proposed long ago on mb-style, but I guess it never got implemented.