Thanks for the clarification, mikechi2. I may just keep the RetroTink if this indeed a direct byproduct of the internal NES rendering.
As for the choice of “poetic” words, James-F, I use the terms “harsh” and “glaring” in the most literal sense. It’s a clear white line, clashing against a myriad of background colors, which puts it squarely into the definition of both. I suppose the perceived air of frustration comes from the fact that this website’s own review of the RetroTink failed to make any mention of it, which did put me off a bit. Considering it doesn’t show up from any other inputs, I think it’s a fair expectation that it be brought up when talking about the tech’s pros and cons.