I have converted my office to Teams and it is really a pretty good collaborative tool, but the transition is taking longer than I like. It always difficult to change human habit no matter how good the tool is.
I also have been working with other departments to start to move the entire company over to Teams, but have received substantial push back because we have taken on so many projects recently. Unfortunately, people don't fully see how it can easily solve a number of our issues. Hoping to have it rolled out company-wide by mid 2020