During interpolation, rounding errors seem unavoidable. The obsessive-compulsive part of me wants to meticulously fix them, but is this considerable effort wasted?
First, since almost no one will ever notice a piece of a glyph being a unit off, does it really matter? Anyway, proper hinting will make rounding errors mostly irrelevant at smaller, low-res sizes. Correct? No? Maybe?
Second, it's my understanding that the set stem values in the interpolated fonts will serve to pull, at least, minor stroke rounding errors back into line during end-user rasterization, which mitigates much of the problem. Again, is this correct?
So depending on whether or not all, some or none of my understandings are misguided, am I missing something important? Are these single-unit interpolation errors non-concerns? Are there some instances where they are a concern?