HN would have rendered at the equivalent of 16px (exactly, actually) on a 90s computer. The issue here is that Apple and Windows assume two different default DP

HN would have rendered at the equivalent of 16px (exactly, actually) on a 90s computer. The issue here is that Apple and Windows assume two different default DPIs for a 90s computer (72 vs 96dpi), and as result, what 1pt is can differ by 1/3rd.