2 days ago a place I'm at switched us from Google mail + calendar + meet to Microsoft outlook + calendar + teams.
I almost can't believe at how good Google's suite of tools are compared to Microsoft. I never used any of MS' office tools until a few days ago.
Outlook's web app doesn't even let you click into an email to mark it as read. You have to explicitly click the mark as read button. It also doesn't intuitively support filters with emails that have + in their name (each email ends up being unique instead of Google doing the more expected thing of letting the filter match all + variants). It also doesn't update its title bar with a count of emails in your inbox. That's things I discovered after using it for about 10 minutes.
Microsoft's calendar is designed so poorly, there's so many quality of life things that aren't there vs Google. There's too many to list but the biggest one is not being able to see the calendar details of team mates when inviting them to an event. All you see is a blocked out amount of time, you can't see their exact schedules even if they shared their calendar with you. This removes a huge human element to scheduling meetings because often times I'll avoid scheduling meetings when folks are just getting out of a long meeting, or I'll buffer it by 15-30 minutes depending on who is doing what beforehand.
I'm not not looking forward to the day when we'll need to use all of MS' tools to replace Google docs + spreadsheet and Slack.