Dassault Systèmes down ~20% on 1% growth… Is AI quietly eating legacy software?

So Dassault Systèmes ($DSY - Paris) just had what looks like its worst day ever. [https://finance.yahoo.com/quote/DSY.PA/](https://finance.yahoo.com/quote/DSY.PA/) \-20% [https://www.reuters.com/business/tech-stocks-drag-european-shares-lower-dassault-results-disappoint-2026-02-11/](https://www.reuters.com/business/tech-stocks-drag-european-shares-lower-dassault-results-disappoint-2026-02-11/) Q4 revenue up… wait for it… **1%** YoY. Full year +4%. 2026 guidance: **3–5% growth**, below expectations. Stock: **-20% in a single session.** This is a €6.2B revenue company with 32% margins, strong recurring revenue, and a dominant position in industrial software (CATIA, SOLIDWORKS, 3DEXPERIENCE). On paper, that should scream “stable compounder.” Instead, the market treated it like a broken SaaS story. What’s interesting is the broader context: * AI-disruption fears hitting European tech * Insurers downgraded after AI tooling news * Investors rotating into hardware / AI infrastructure (Siemens Energy +5%) * “Unforgiving software tape,” as JPM put it If AI can increasingly generate, simulate, optimize, and prototype designs faster and cheaper… what happens to traditional high-margin industrial software vendors? Dassault says 3DEXPERIENCE and Cloud are growing (10% / 8%), but that’s not hypergrowth anymore. And +1% in Q4 is the kind of number that makes investors nervous in a market obsessed with AI leverage.