In WebOffice we implemented support for these Wayback services a few days ago. WebOffice customers who already migrated to the current version are now able to include older orthophotos as a service and track changes over time. This was technically implemented with an OGC WMTS service in combination with timestamps for the desired time.
This allows you to benefit from a worldwide map service that you do not have to maintain. Wayback services are of course also available in other ArcGIS platform products such as ArcGIS Pro.