Has anyone here ever needed bathtub flooring in your bugtent?

This thread maybe should have went in the gear thread but oh well.

Im making the switch to a bug tent/tarp combo. A few of the bug tents have the bathtub flooring and I was just wondering if anyone has ever been in a situation where one was needed or if they are generally unnecessary.

In my MSR Hubba I have never experienced a situation where water could have gotten in if it didnt have that style of flooring. So…..

Is it necessary?