Reply by MyFathersSon

Along with what Ike mentioned—there is the noise factor.
The first couple of tables I built I bolted the router directly to the underside of the top.
With my latest table – I decided to get with the program and use a plate.
It does make a lot of things easier———-
But the noise level almost doubled with the router vibration being amplified by the plate—rather than deadened by the top and the case.
Yes – I’m still using the plate—but I have added better ear protection.

-- Those who insist it can't be done - should politely refrain from interrupting those who are doing it.