$wpdb Not Instance of wpdb

Some silly plugins actually check or enforce that $wpdb is an instance of the wpdb class, which does kind of make sense if you prefer strict code. But in the case of WP DB Driver, $wpdb is set to an instance of the wpdb_drivers class, so this test fails.

These checks could be in the form of:

function my_func(wpdb $wpdb) {
    ...
}

Or just:

if ($wpdb instanceof wpdb) {
    ...
}

To circumvent this, wouldn’t it be a good idea to extend the wpdb_drivers class from the wpdb class? This would solve any issues like this with other plugins, and also make it more semantic.

What do you think?

https://wordpress.org/plugins/wp-db-driver/