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by ygra 3369 days ago
Saving bytes in CSS was probably not the primary concern upon standardization in 1976. Note that the PostScript point (now the most common definition) is younger than that. Common usage doesn't always follow the best option that's available, as evident by many examples throughout history.

Furthermore, having a measurement that can frequently be used with integer dimensions is convenient, which is probably a large part why we still use points. 12 pt is a convenient font size, so is 4 mm (technically 4.2 mm, as 11.8 pt would be 4 mm), but while 10 pt is still convenient, 3.5 mm is less so. Smaller units lead to more useful integer values (within reason, of course).