Why does WC use both class autoloading and including files via include_once?

Question

WordPress

If you look at the WC code, you can see that files (including classes) are included in the main plugin file. Isn't that the task of the autoloader? Why are these two class connection methods combined?

Answer 1

There are no non-spaces in WC. Therefore, the connection through include_once. Maybe someday WP will be rewritten for autoload out of the box. Now it's just crutches