Agustin Barrientos compares a list of 50,000 cards rendered three ways. The content-visibility: auto approach with contain-intrinsic-size keeps every row in the DOM and skips rendering work offscreen, while virtualization unmounts rows and quietly takes find-in-page, fragment links, focus continuity, and per-card state away from the browser.
agustinbarrientos.com/writing/senior-eye/content-visibility-vs-virtualization