There's people here devaluing this because "AI probably built this page". To me this is a perfectly valid use of AI; "Hey I got this set of data points, give me a page with these 'extractions'". The page layout is the least interesting part of the page, it's the data points that should be of interest, then again this is where I think the page is lacking.
"1k real browser viewports" (page says 751 data points) tells me it's a quite small sample size to draw the amount of conclusions they draw. Now this is me guessing but I think it might be people actually visiting their site. Probably in the quest for viewport size, this might be why a whopping 6 percent of visitors appear to be visiting with their browser in full screen mode, and almost as many from a device with an 800x600 resolution (I can hear the device owners friend asking "man, what resolution are you running that thing at? Go to this site and check!").
AI report on actual data, not a problem. Low quality data to actually run that report on, now there's your problem.
Only showing the most common values means that sizes of non-maximized windows are lost in the noise. It would be nice to see a cumulative size distribution that would show the percentage of viewport widths smaller than x, for various values of x. Then a developer could easily see that if they make the content e.g. 900 pixels wide, what percent of users will have to scroll the viewport left/right.
I've never found it that useful to see a list of numbers of sizes. I can't visualize them quickly, and in the end the exact pixels doesn't matter, it's the various ratios.
I made this ~15 years ago. Took all the common phone resolutions at the time and scaled so that they all were similarly tall. Then it gave me a good grasp on what aspects my game needed to support. https://imgur.com/a/JT5JyyH
"1k real browser viewports" (page says 751 data points) tells me it's a quite small sample size to draw the amount of conclusions they draw. Now this is me guessing but I think it might be people actually visiting their site. Probably in the quest for viewport size, this might be why a whopping 6 percent of visitors appear to be visiting with their browser in full screen mode, and almost as many from a device with an 800x600 resolution (I can hear the device owners friend asking "man, what resolution are you running that thing at? Go to this site and check!").
AI report on actual data, not a problem. Low quality data to actually run that report on, now there's your problem.
I made this ~15 years ago. Took all the common phone resolutions at the time and scaled so that they all were similarly tall. Then it gave me a good grasp on what aspects my game needed to support. https://imgur.com/a/JT5JyyH