Let me add 30" IMHO is to wide for a work bench top but might be good for an assembly bench..
My bench is 32" wide but has a 18" work surface 6" tool tray and then another 6" wide work surface after that..
I use it for working wide and narrow parts and know that anything wider than 24" is a long reach across the bench..
Gluing up boards is much more easy than you can think of of especially if the top is thick..