This stacked area chart shows the evolution of music formats (CD, vinyl, digital, streaming, and CD singles) from 1973 to 2019, revealing the rise of digital and the resurgence of vinyl. Built with React and D3 v7, it uses `d3.stack` and `d3.area` to render the layers, with `d3.schemeTableau10` for colors and hover interactions to highlight individual formats. Data is parsed from a semicolon-delimited CSV through `d3.dsv`, converting European decimal commas. The chart animates on load with D3 transitions and includes interactive legend and tooltip elements for exploration.