We've seen many resignations by moderators recently, now even on some of the sites I'm more active on. It's been hard for me to keep up. But curiously, though these users say they are resigning and possibly even completely logging out of the system, their diamonds are remaining steadfastly in place. Is this yet another bug fix that has never been dealt with? Is it that even though the status has ended, the text in the names is not automatically reverted (which wouldn't surprise me)? Or is SE holding out hope that some of these fabulous contributors will somehow come back into the fold?
I've seen no statements of reconciliation regarding these losses, or even references to the recent drastic decrease in (voluntary) moderation of the site. But maybe I've missed it.
Update: This is the first statement I've seen of Stack Exchange acknowledging this.
To all of the moderators who have resigned or suspended your activities over the past few months: your presence and impact is missed. We value all of your work to keep your sites clean and communities healthy. We understand the many reasons why you felt that it was necessary to step down, and that it was a painful decision. We are working on many of the issues that influenced your decisions to leave, and we aim to back these intentions up with actions, accountability, and consistent open communication. If you feel that your issues continue to go unaddressed, I invite you to post about them on Meta in a respectful way. And if you choose to apply for moderator reinstatement, we look forward to hearing about this as well and to seeing you back on your sites.
Another Update: Moderators are being given an extra communication channel.. Such communication (or lack thereof) is a consistent theme among the resignations. I notice that many of the diamonds are still there, and at least one mod came back.