Currently, IN has quoted a requirement of 14 systems which will most probably go onboard the following platforms:
04 P-28
03 P-15
03 P-16A
03 Talwar class / P-17
01 INS Vikramaditya
After all this requirements are fulfilled then only they will move to the newer platforms.
Also, we should start referring the Indian version of DRDO-IAI missile as MRSAM instead of Barak-8. Barak is their own domestic missile system comprising of 3 types.
There are some people who are fantasizing that MRSAM should be replaced by Akash NG. Rest assured that will not happen. MRSAM is our own missile and it will be backbone of Indian Armed Forces for very long time. Even though it is costly, still it is very capable and I think it is also the second tri service missile after Brahmos.