I've been trying to remove "old" stuff around the site and clean up a bit, keep my server hosting costs at a minimum. I realized months ago that messages stayed in the database even when users deleted them and their accounts. Just unnecessarily taking up space in my database, and that's going to stack up after awhile. I just don't have time to go through, FTPing into my site to dig around, and clear these out all of the time. This helps clear that up fast within the Oxwall console and is really easy to use. Just, like, 3 clicks and it does it's thing. Good work.
Over time website performance will be compromised with the accumulation of messages that are not deleted or even archived. This is most noticeable on websites with a few years with a high number of users. This plugin has helped me clean a lot of this junk that is getting accumulated. This feature should be a required feature in the core of the message plugin.