Let's take a break from Tableau to look at a relatively new player in data visualisation. Google has been sort of doing data analysis and visualisation with Google Analytics being a favourite for website traffic tracking and analysis, and Sheets providing excel type functionality. While you could link your Google Sheet to your Analytics data, it wasn't the best visualisation tool, and in fact Tableau was a popular option for Google Analytics data visualisation. But now the Google Analytics team has a new offering to be used either for an analytics 'custom report' or for any dataset, with some connectors provided.
This follows the lead of Microsoft who integrated it's various 'Power' add ins into Excel trying to upgrade it into a BI tool. It makes sense that other big companies then try to compete with Excel and other dominant players such as Tableau.