[dendory]

I think the security aspect is the best option. If a CEO can't access some proprietary web app and is told "You need to use browser X that supports DRM", then they will be "Why isn't that already installed on my system". But if they are told "The web app uses hidden code that may be insecure, and cannot be audited" then you'll have executives, people in actual power positions, say "Get that stuff off our network".