Collectors running Windows 98, ME, or early XP often find that Version 9 is the "sweet spot" for performance without the overhead of later versions.
While primarily a game preservation project, their community often provides resources for the runtimes needed to play them. Installation Tips
Many Fortune 500 companies built internal training modules, POS dashboards, or inventory maps in Flex/Flash Builder 3. Upgrading these systems costs millions. Some IT departments run air-gapped Windows XP or Vista machines that specifically require Flash 9.0.246 due to API changes in later versions.