If you've ever tried to use the CONCATENATE [office.com] function in Microsoft Excel to merge the values in a range of cells, you know it doesn't work unless you add each cell to the function, one by one.
You might have noticed the following message in the support article for CONCATENATE:
Important: In Excel 2016, Excel Mobile, and Excel Online, this function has been replaced with the CONCAT function. Although the CONCATENATE function is still available for backward compatibility, you should consider using CONCAT from now on. This is because CONCATENATE may not be available in future versions of Excel.
for CONCAT and TEXTJOIN
Note: This feature is not available in Excel 2016 unless you have an Office 365 subscription. If you are an Office 365 subscriber, make sure you have the latest version of Office.
While it is admirable that Microsoft is finally fixing some of the idiosyncrasies of it's software, I fear the future will bring a level of fragmentation unseen since the office 2003 to 2007 switch.