p_vouers282571 i don't think you know what you are talking about.
The mysql extension has been deprecated as of PHP 5.5
PHP PDO and PHP myslqi are the options now, so it is not a matter of backward compatibility, as in PHP 7+ the PHP mysql extension is not working (by mysql extension i am not referring to DW extension but to a PHP Database Extension) so you have to convert your code to PDO or mysqli. So the good software is an UP TO DATE software... and in this case it cannot be backward compatible as when your server gets updated to PHP7 it just won't work :)
And while mysqli only supports connections to mysql db, PDO supports 13 different databases.
P.S. your "IN THIS COUNTRY" statement sounds really funny :D
