You rout thru the pattern? Or the paper to the edge of the pattern?
Not enough to say, I would think. I rout plywood for almost all of my projects, and no issues. Wear on a router bit, in my experience, seems to depend mostly on what brand I am using, I try to stick with high quality bits, unless I need a bit right now, then I pretty much take what I can find locally..
I don't rout glued down patterns, I cut them out with my scrollsaw, then sand to final shape. But this is how I make my masters - glue the cut out pattern to another piece of plywood, use the first one to rout the glued on piece, and that gives me a 1" thick master - which is what I use to rout out pieces.
NC via the Army in 1979; retired 1981, just east of Raleigh ever since.
Remember, when I tell how I do something, that does not mean I recommend you do it my way. Different backgrounds, experiences; what works for me, may not for you.
"It ain't what you're told, it's what you know." - Granny Weatherwax
No point in believing in things that exist. If they exist, you don't have to believe, they just are.