>none seem to handle multiple calendars well. I have a personal calendar, a work calendar, and a side project calendar, I want them all to be independent, have tasks blocked out on them, etc, but still be aware of each other. So for example, I want to schedule a doctor’s appointment on my personal and have my other calendars mirror that time block, but scrub the details/make it generic. Super specific idea obviously, but if I don’t have it I have so much manual overhead aligning everything that I just give up and do it by hand.

YES, THIS! Managing personal, family, and work calendars is a nightmare. So much double handling.