I don't know what "photosphere" is (again, don't care about the camera)
It's amazing, IMHO. It's the difference between a pan shot and street view (ie, look up as well).
I'm only going to see a few amazing things given the opportunities available to someone like me even with our economic mobility, but I love going back and revisiting the things I've seen in detail. The cliffs of Ronda or the ceiling of the old bath houses below it, the view from the central hotel in Reykjavik or the shared rooftop patio in my old apartment; or date-stamped pics of that apartment so the landlord can't say we hosed the trim in the second bedroom. These are things I love to go back to and spot new details I missed at the time but are interesting or important later, and I have a massive collection of such treasures.
I won't be back to the natural history museum near the Atlanta zoo and its phenomenal dinosaur skeleton, as I don't get to fly except for work and that job's done, but I forgot until I looked again that they assembled small skeletons of winged dinosaurs as part of it: I blanked on that until I reviewed it years later, for instance.
Photospheres are a thing that, once you realize the dimension they add to a good panoramic memento, you just can't do without, IMHO.