"As far as Webex requiring patches, everypiece of software I have by Micorsoft, Adobe, etc., has frequent updates/patches. Nothing is perfect, and circumstances/threats change. Patches are a given".
The current/and continuing problem is the security is an add-on with webex, some markets can not tolerate these issues by law.
Some newer offerings (read Centaflix) have had the advantage of not being the first to market and have had the ability to learn from some of the first to market services mistakes and avoid them.