It takes many years of development and testing to field a missile defense system this is why THAAD as well as the Patriot batteries in South Korea remain so important to the defense of Korea:

South Korea’s Army said Thursday it is pushing to acquire an advanced interception system to defend against evolving missile and artillery threats from North Korea.
It unveiled the plan for the acquisition of the low altitude missile defense-II (LAMD-II) system that is intended to shoot down North Korea’s new ballistic missiles, such as the KN-23 and the KN-24, and its super-large artillery rockets in a report for an annual parliamentary audit.
LAMD-II will be an improved version of the LAMD system that Seoul seeks to develop by 2029.
The Army added that it is also planning for the early development of the Korean Tactical Surface-to-Surface Missile-II (KTSSM-II) as part of efforts to bolster the military’s Kill Chain preemptive strike platform against the nuclear-armed North. It aims to develop the KTSSM-II by 2030, earlier than its initial target year of 2034.
Yonhap
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![A photo uploaded to social media late Tuesday night by residents close to the 18th Fighter Wing Air Base in Gangneung, Gangwon shows a fire caused by a Hyunmoo-2 short-range ballistic missile crashing shortly after being launched. [YONHAP]](https://i0.wp.com/koreajoongangdaily.joins.com/data/photo/2022/10/05/ee9ea2a0-6277-478e-9c00-d135bae9c794.jpg?w=640&ssl=1)




