I don't recall TNG ever going to warp 10. I have a TNG manual at home if you want exact numbers on stuff. What about stuff from the movies.
The Voyage Home had them slingshot around the sun to reach warp 10, I think. Warp 10 on TOS was regularly exceeded in TNG, so that must be out.
Then there is the trip to the center of the galaxy in just a few weeks.... We'll just pretend that didn't happen, for the sake of our sanity (or whatever it's been replaced with)
