Oh, it is, OS is nothing without software. The two samples of missing features in Outlook and Quicken for Mac were enough to force me to run Windows on MBP in VM. Heck, I was even remoting into Windows VM and using the mounted Mac drive in it because I somehow didn't like full 3440x1440 MacOS screen scaled to fit 13 inch MBA display.
But that's not really a point, software repository size for MacOS/OSX was always order of magnitude smaller than Windows. Hardware and its integration with OS was making up for it, and while the integration part is as good as has always been, the hardware design choices are alienating people who think that iPad is not going to replace a computer.
I don’t use quicken so I can’t relate, but hundreds of people in my organization use macs running Outlook connected to our corporate exchange servers. They are auto archiving just like the windows machines, so I’m not sure what is different.