That's a good point. 1/64th" doesn't sound like much but on an assembled frame seems to be a lot. Doing the final pass with the router cleans all that up. Have to move quickly though to avoid burning.I climb cut every time I do an assembled frame, for example. I push up to about an inch from the [outside edge] corner, then ease back to the finished section. Really, I do it anywhere I m going into end grain.
Once you hit the already shaped portion, the router fights you very little, if at all. Of course, from that point, you just start moving forward again.
I find myself working frames and things off my D handle more than my table, but do find need to do climb cuts on that too.