We purchased the MySQLi extension because you led us to believe that it was "important" and that we should do it "now" so that our "...websites will continue to work when the next version of PHP is released". All very powerful wording wouldn't you agree? (please see http://www.webassist.com/product/mysqli)
You are now telling us that months on - the latest release of MySQLi extension was July so it has been on the table for some months now - there is no time frame for when the other extensions will be released for MySQLi support.
So, we are left having to scrap the MySQLi work we've done up to now and revert back to using extensions that generate code that you've informed us won't work when the next version of PHP is released.