1) 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.
2) they are all dogshit slow (not sure about this one, haven’t tried it). The combo of electron apps and what I guess is just calendar synchronization latency makes them have surprise ux patterns and overall just shitty experience in general.
A third thing is that I really enjoy planning my life with a kanban, and executing my day from a todo list (scheduled). That’s hard to nail.
Last: my notes live separately (as most people’s do I’ve seen anecdotally).
I hope someone can really succeed in this space because time blocking is so powerful, but nothing has fit my lifestyle quite right yet unfortunately.