Really? The router gives a cleaner cut, even in plywood? I've never tried using the router for dados, just figured the dado blade would be cleaner. Guess what I'm trying tomorrow.It depends on what I am doing...but if I can, I always use a router for 3/4 dados....so much cleaner then a stacked head and no one likes a wobble head.
For cabinet carcasses and the like I use two routers. One set up with a bearing to cut a rabbet in the ends of the bottoms, tops or whatever that leaves 1/2" of stock sticking out 1/4 or 5/16ths. The dadoes in the sides I cut 1/2"wide by 1/4 or 5/16ths strong deep..........I will use the router as I have 1/2" and 3/4" bits designed for the "less than advertised thickness". If I'm using Baltic Birch, which I use as often as possible, I will use the stacked dado as I can put in the exact amount of chippers and the fit is perfect.