Drupal 7 will be PHP 4 incompatible

It was announced at drupal.org today, that Drupal 7 will be PHP 4 incompatible. This is a huge decision to take, since it will make it impossible for many to run Drupal 7.
But in my opinion it's about time.

Dropping support for PHP 4 in such a big project as Drupal is a great kick in the ass for the PHP community to upgrade to PHP 5.

PHP 5 is three years old now, and way to many is using PHP 4 that was released seven years ago.

For more information about the breaking PHP 4 compatibility take a look at the GoPHP5 page.