Using globals everywhere and encouraging spaghetti code with its classic themes, and with its new themes it evidently learned nothing and is encouraging JSON inside HTML comments which obviously has no editor support, is very prone to errors, besides being just plain stupid (like seriously, some senior engineers I assume decided to have templating inside HTML comments as JSON?). If I had my tinfoil hat on, it's almost as if they actively try to kill the freelancer or digital agency market and push everything to its WYSIWYG site builder on WP.com.