Seriously, the year 2000:

https://adrianroselli.com/2000/07/real-world-browser-size-stats-part-ii.html

In 1999 I was telling people not to count out 640 × 480:

https://adrianroselli.com/1999/07/640-x-480-isnt-dead-just-yet.html

And like 20 years later it was true again.

Anyway, the last time I reported it was 2013:

https://adrianroselli.com/2013/01/my-viewport-sizes.html

That’s like a whole high school reunion ago.