Thank you for reaching out to us! I would be happy to provide some context.
We currently do not have all of the information as to when the Fabric SDK will stop reporting crashes, however it will likely be closer to the end of the year. That being said, your apps will not crash after the Fabric SDK is no longer supported, they will just stop sending crash data to your Dashboard.
The Fabric website will be completely shutdown in March, including Dashboards, and any of our docs. Navigating to the Fabric website after March 31st will redirect you to Firebase.
This means you will need to link your apps to Firebase before the end of March if you want to keep your 90 day historical crash data, and you will need to update to the new SDK before the end of the year if you want to keep receiving crash reports.