Modern plunge routers are very sturdily built, and you won't notice any degrade in performance. The best reason to use a plunge router in a table is because you can only afford one router and a big plunge router is it.
What is a router table called?
https://www.youtube.com/watch?v=jamwRhQTJbA
How tall should a router table be?
The Router Guys Our tables are 41" high. The best height is 5 to 7" off end of your bent elbow to the table top.Oct 27, 2004