It is just making "more official" what was more discreet non-official thing for ~ 40 years now anyway.
i.e Saudi bank roles the nukes in exchange for immediate deterrent access should SHTF with say Iran.
That was large reason Saudis acquired DF-3s (static) and DF-21s (mobile) from PRC.
That...
The South Koreans basically took the Gerrman design (214) and upgraded it with a large VLS section, this was a key requirement they evolved to have the capacity for an underwater deterrent should the need arise later.
That was the main reason AFAIK they didn't just go for an improved 214 (with...
INS Androth:
https://economictimes.indiatimes.com/news/defence/grse-delivers-second-anti-submarine-warfare-shallow-watercraft-to-indian-navy/articleshow/123869383.cms?from=mdr
Will be funny if these are refurbished and sent to India (which maybe buys more later)
https://economictimes.indiatimes.com/news/defence/russia-says-it-is-in-talks-to-supply-more-s-400-missile-systems-to-india/articleshow/123667119.cms?from=mdr