I can tell you exactly what I was told by a very respected professional pipe carver;
You only need a 1 millimeter carbon layer, for protection.
More than a 1 millimeter is counter productive, because the main point is about protection, anything beyond this is not providing any additional help.
Of course a lot of people consider the build up on a new pipe in the beginning, when you’ve reached this stage, as a sign of break in. It’s not that the 1 millimeter layer means you’ve actually broken in the pipe, but rather, by reaching this level, the briar has settled in somewhat.
The interior of the chamber has been charred, any residual oils from the wood burned out, and more of like, a curing process has taken place.
So seeing the 1 millimeter thickness, is a sign of simply reaching a stage, where it’s hopefully improved. But some pipes might even take years beyond this stage too, and get better with age.
There is also no need for a reamer, if you wipe the chamber out after smoking, with like a paper towel/napkin. By doing so, the carbon build up will never get thick, especially if you wipe it while slightly warm, you can wipe out excess, as to always maintain the thickness.
To answer the question; No