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16:10 goes ALL the way back to some of the earliest widescreen LCDs. The original Apple Cinema Display was 1600x1024 in 1999. This was predated by the SGI 1600SW with the same resolution in 1998.

The Matrox Millenium II supported 1920x1200 in 1997.

Manual for the Mac version, but the PC version has this resolution as well: https://www.matrox.com/sites/default/files/en_millennium_ii_...

IIRC it's so since Titanium PowerBooks which were the first to go widescreen at Apple, so it's 2001. Then aluminum PowerBooks with 16:10 screens, too. Intel MacBook Pros continued the trend.

... Wait, really? Huh. I thought the Powerbooks were 4:3 til the end, but yeah, just looked and you're right. (I had a G4 iBook at the time, which was 4:3).

Most if not all MacBooks today are still 16:10 ratio..

Strictly speaking they're not; the bit below the notch is, but you get a bit of extra space around the notch to accommodate a menu bar.