With the time-slider capabilities of ArcGIS Online, you'd think ESRI's pinnacle imagery service (World Imagery) could be offered as a time-enabled service that displays Wayback tiles and that can be ingested by my personal or Organization's ArcGIS Online web map as a single layer. Why do I have to add individual tile service layers in order to see historical imagery?? Is there a way I don't know about that doesn't involve coding or web app builder? This adds to the already frustrating lack of the ability to group layers!