alt Hacker NewsI’ve certainly noticed this in film and interior design (most AirBnBs will have a familiar grayscale palette), but the opposite trend has occurred in software. Windows 2000 was far less colorful than Windows 10, which in turn had a more saturated palette than Vista and Windows 7.
And Windows 11 is significantly less colourful again. Also, you're missing out the most colourful version of all - Windows XP!
(The first thing I did with WinXP was revert it to the Win2K look - restricting the use of colour to where it's useful: namely showing me which bloody window is active.)