I find it less useful than the macOS calendar.app because it doesn’t let me view my iCloud calendar which I use for personal events or birthdays from the iCloud contact database.
The ui and interface is pretty snappy, and if notion is bringing on the team to speed up their client software it will be welcome.
It’s marketing. Read the qualification as “good”, and trust it as much as any marketing.
Yes.
What functionality of a calendar is speed dependent? Genuine ask and not trying to be snarky, speed just hasn’t ever been something I’ve ever had to worry about with a calendar tool so the notion (pun not intended) is merely a foreign to me personally.
Is it opening events? Creating a new calendar item? Syncing, or something else?
Where is the speed gained in from compared to Calendar.app?
That’s the thing I’m not growing here and sorry but the answer above doesn’t tell me this