What are websites that are considered to have advanced functionalities?

These are the websites that are considered to have advanced functionalities:

• E-Commerce (WooCommerce, Easy Digital Downloads, WP Simple Pay, etc)

• Membership (MemberPress, Restrict Content Pro, etc)

• Learning Management Systems a.k.a LMS (LearnDash, LifterLMS, Sensei, etc)

• Multilingual (WPML, Polylang, qTranslate-X, etc)

• Outside API, or Software Integrations (auto-populating real estate listings, etc)