Spark Open Source Streamgraph Topic Over Time Infographic

Data visualization infographic titled "Streamgraph Topic Over Time" using TREND LINE (over time) as the dominant visual element, designed to communicate inequality clearly and honestly. Main chart: a large multi-series stacked area streamgraph over time with a clearly readable horizontal time axis and vertical value axis, both with sharp English labels and tick marks. X-axis label: "Year" with ticks "2016", "2017", "2018", "2019", "2020", "2021", "2022", "2023", "2024". Y-axis label: "Share of attention (%)" with ticks "0", "10", "20", "30", "40", "50", "60", "70", "80", "90", "100". Show 6 topic bands with plausible illustrative values that reveal concentration over time: "Spark Open Source" rising from 18% in 2016 to 46% in 2024, "Data Platforms" from 20% to 22%, "AI Tools" from 8% to 14%, "Cloud Infrastructure" from 16% to 8%, "Databases" from 22% to 6%, "Other Topics" from 16% to 4%. Make "Spark Open Source" visually dominant by 2024, with widening gap versus the smaller bands to emphasize inequality. Include a subtle secondary annotation line or bracket highlighting concentration growth: "Top topic share" from "18%" to "46%". Add 4 key insight callouts around the chart, each with a small icon, a headline number, and a short English interpretation: 1) magnifying glass icon, headline "46%", text "Spark Open Source captures nearly half of total attention by 2024." 2) upward trend icon, headline "+28 pts", text "The leading topic gains 28 percentage points across the period." 3) stacked bars icon, headline "4%", text "Smaller long-tail topics shrink to a minimal combined presence." 4) inequality icon, headline "2.1x", text "The leader is more than twice the size of the next-largest topic in 2024." Add a small side mini-panel labeled "Inequality snapshot" with simple comparison columns for 2024 only: "Spark Open Source 46", "Data Platforms 22", "AI Tools 14", "Cloud Infrastructure 8", "Databases 6", "Other Topics 4". Add a concise subtitle in English: "Illustrative topic attention over time, highlighting concentration in one dominant stream." Add a small source / data-note strip at the bottom in English: "Data note: Illustrative example for visual concept only. Figures are not sourced observations unless user-supplied data is provided. Scales start at zero; no axis truncation." Visual style: NYT graphics desk meets Economist warm beige palette, editorial restraint, muted sand background, warm beige and cream canvas, charcoal typography, rust, ochre, muted teal, slate blue, and soft brick accents, strongest contrast reserved for "Spark Open Source". Clean hierarchy, thin gridlines, elegant labels, subtle texture, spacious margins, sophisticated newsroom feel. Ensure honest proportions, no misleading scale manipulation, and precise chart readability. editorial data journalism illustration, FT / Bloomberg-grade chart aesthetics, vector-clean infographic layout. All text MUST be written in English (array). Every heading, label, caption, legend and metric name in the image must be in English — not English. Spell each English word correctly using English characters and diacritics. Numbers stay as digits, no fake authoritative sources cited, no watermarks Numbers labeled "illustrative" unless the user supplied specific sourced data. No fake authoritative sources cited (do not invent "Source: Reuters 2025" — use "Illustrative example" instead). No misleading axis truncation or scale manipulation.