Virtually 100% of my clients can open Word / Excel / Powerpoint documents, and you'll have to pry Excel from my cold, dead hands =). I personally love the power features of Excel, and even do some VBA scripting to automate some workflows in Excel and Outlook.
I don't do much real-time collab on documents at the same time with other folks on my team, so I can't attest to that - though I hear that Msft has come a long way here and the Fluent roadmap looks really promising.
If you have a column of phone numbers with leading zeroes, coming in from a csv, it decides it's a number and drops the leading zero, which breaks the phone number.
And everyone knows, Microsoft Office isn't perfect...
https://support.apple.com/en-us/HT206181
"Invite others to your documents and work on them together in real time. Collaboration is built into the iWork apps on iPhone, iPad, iPod touch, Mac, and iCloud.com"
Last time I remember using modern-ish GUI Office-type programs that felt this respectful of system resources was years ago when I used Linux, and I dropped OpenOffice (too damn heavy and slow) for some of the single-purpose alternatives like Gnumeric (is that even around anymore?). Apple's various utility and basic productivity programs are really damn good (god I love Preview) and a big part of what keeps me suffering through all the bad things about Apple products.
However you also gain something. For me personally actually three things:
* I no longer feel like the service I’m using is like a rug that can be pulled from under my feet at any moment
* My data (mail, documents, etc.) are now actually under my control and not in some “arbitrary“ format on a server I can’t reach except from my browser
* As a bonus feature, my mail is only read by me and my behavior is tracked by no one