Why are cookies considered technically indispensable, and why are the alternatives limited?

Cookies are essential for session management, e-commerce carts, and personalization; alternatives like Local/Session Storage and IndexedDB exist but have security and scope limitations.

Indispensable functions:

• Session management — login & authentication state
• E-commerce — shopping carts & payment flows
• Personalization — language & preference settings

Why alternatives fall short:

• Local/Session Storage — browser-specific, not sent automatically with requests, no built-in security flags like HttpOnly
• IndexedDB — powerful but complex for simple app data

Disabling cookies entirely breaks core functionality: sites show errors or work only in a degraded mode. This is the key tension — cookies are both a privacy problem (third-party tracking) and a functional necessity (first-party state).

Go deeper:

• Using HTTP cookies (MDN) — session management, security flags and why storage alternatives differ.