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    It is possible that the conditions have changed to the point where the old problems no longer exist at all, and the warning comments have become like the place on old maps that say, "Here be dragons." Dive in and learn what the situation was, or see that it has passed in to history. Commented Apr 6, 2017 at 14:33
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    In the real world, some devices don't provide a reliable readiness indication but instead specify a maximum unready time. Reliable and efficient readiness indications are nice, but sometimes one is stuck using things without them. Commented Apr 6, 2017 at 19:12
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    @supercat Maybe, maybe not. We can't tell from the comment here. So it's worth investigating to, if nothing else, improve the comment with specifics. Commented Apr 6, 2017 at 19:53
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    @DavidSchwartz: The comment certainly could be more helpful, but it's sometimes unclear how much time a programmer should spend trying to map out all the precise ways in which a device fails to abide by its specification, especially if it's unclear whether the problem is expected to be a temporary or permanent thing. Commented Apr 6, 2017 at 21:00