> That said, MacOS 10.6 was the pinnacle of Calendar, and it's been on the way down since...

10.4 Tiger

They started to ruin the iCal user interface in 10.5 Leopard.

In general, 2006 was peak Mac. When it was Apple main product, before iPhone.

I hear this a lot. Or that Leopard or Snow Leopard was peak Mac. That part of the debate doesn't interest me.

What does interest me is that pre-Lion software is well understood. The behaviors and expectations and commands are re-implementable. Isn't it time someone just made SwiftUI-Tiger or somesuch?

Heck yeah, I love using my 10.4.11 Macs. 10.6.8 as well, of course. To me those two were real high points in the life of OS X, thus far. The computers themselves were still super cool and had a lot of character, too -- another thing that has gradually faded over time, IMO.

I would disagree with this.

Mac Mail is probably the worst application I've used on Mac (+ the one on the iOS is not far behind). Search is atrocious - like unusably so, it constantly has syncing issues (even with iCloud) when trying to get new mail, it's incredibly slow, and I don't care for the design.

Fantastical is the Apple Calendar replacement that should have been mentioned.

It was until it went subscription, and not even at reasonable price imho.