Context: was looking for a decent service to give me a calendar a little while back but one thing that kept stopping me is there seems to be absolutely no service that just offers you a nice calendar, its only email services that happen to offer a calendar on the side.
I don't want another email. I have enough, and my current one is tied down to gmail (but I'd prefer if my calendar wasn't).
I'm sure there must a historical reason for this, but also why is does it still persevere?
One is a scheduling and time management thing, the other a communication system. I don't need to sign up for a messaging app to have a todo list.
Probably because that's how most people know it from work. There it comes from Microsoft Exchange, Lotus Notes (I think) and Gmail.
Personally I have my calendars on my own Nextcloud instance. That's mainly for files. But I use that anyways, so getting calendars, contacts and passwords was a nice bonus.