Ah of course. Just a few few weeks of dev time to build the same thing a multi-billion dollar company sells. Then after a few weeks of dev time you find out you're missing about 80% of the features that makes tableau useful. After that few weeks your manager asks you how the project is going and you just mutter something about how you should probably just buy looker or tableau.
Nah, these sorts of folks are far too obdurate and prideful to ever willingly admit defeat. More likely they would keep telling the manager that they just need a few more weeks time to finish it while they frantically keep rolling that Sisyphean boulder up the hill.