questions about security implemented in CI4 (or who will be implemented)

Hye.
I have some questions about security implemented in CI4 or perhaps will be implemented in CI4.

# Does CI4 will implement all the security that CI3 provides (like $this->input->post($var, true)) or more ?
Or does it already implement it ? (against sql injection, xss attack, etc.).
I see against csrf on documentation. I know that all documentation isn't written but i would like to know if in the roadmap all of this is provided.

# Or, will it be necessary to create our own necessary filters switch case ? (handmade with filter_vars for example)

Thank you for your answer.