Hey @user2099! Daniel from Customer Support Engineering here 🔧
While viewing the Contacts section in Intercom, you'll see that we have implemented a "slipping away" filter for both companies and people. The filter shows those who have not logged on in more than 30 days, but less than 60 days, and have more than 5 web sessions. You can of course create your own similar filter and create a segment from that. We don't have any pre-built reports for anything like this, but I think you will find the live contacts view to be useful.
Hope this helps 🙌