I think it was the version bundled with Google's Chrome browser being referred to, and not the standalone Adobe Flash Player for Linux, which is quite old now.
It isn't actually very old – not much older than current releases on other supported platforms, because quite often security bugs affect it as well, and Adobe updates it as well.
Adobe has promised to support the NPAPI Linux plug-in for a few more years (IIRC till 2017). It doesn't get any new features, but security issues will be fixed, usually at the same time as on other platforms.
