Did you ever upgrade to Office 2019?
I did, but only because it became apparent that 2016 is flawed. With Excel 2016 working with a small data set, Excel would occasionally hang and ignore typing input. This led to typos and data going into the wrong cell and was not an issue in 2011. I almost went back to 2011, but discovered that 2019 fixed this problem so I am reluctantly current.