>You also need more solar and more batteries to power all that ISR.
I wonder if it would be feasible to use smaller sensors and on a smaller platform - then combine that data. Similar in concept to Gorgon stare where the idea was to combine data from multiple UAVs to create a larger image to provide a greater simultaneous coverage area.
https://longreads.com/2019/06/21/nothing-kept-me-up-at-night...