Jesus, the WordPress ecosystem is such a cesspool of junk code and trash plugins…
Apparently, the "developers" of a WP plugin called "Woo Commerce" consider it normal that their code is *so* shitty it might end up requiring more than 1000 distinct variables in $_GET, $_POST or $_COOKIE, and recommend changing PHP's "max_input_vars" setting from its (absurdly high) default of 1000 to a value of 3000. 🤯