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Temporal Drift of Obsolete HTML Tags in Live Websites
This page measures the proportion of surveyed websites that contain specific obsolete HTML tags, as well as the total number of such tags found across all sites. The data are gathered from automated crawls of live web pages, taken at regular intervals to capture a snapshot of current usage. Tracking these figures reveals how quickly the web is moving away from outdated markup, serving as a proxy for technical debt and the pace of code modernisation.