Well, India certainly needs more conventional submarines with AIP for operation close to the shore. SSN's cannot replace conventional subs. For one they are very expensive and should be escorting high value assets like our SSBN's. Also since they will be big with under water displacement of > 6000 tonnes, it will be difficult for them to operate in shallow waters.Probably means that the P75I is going to get cancelled. Getting yet another foreign submarine into the fleet would be retarded.
Also we don't have excess money like the US to field an large fleet of SSN's.
There are no verified reports that P75i has been cancelled. But if true, one reason could be that our indigenous SSK design with an indigenous AIP is ready.
Now why the VLS requirement for the P75i program has been withdrawn (if true) is an question mark. Does it not offer significant advantages over the torpedo tube launched missiles?. Though will cost more. A proper technical answer is needed.
Whether the P75i is on or off, an follow-on order for additional Scorpenes is warranted. Probably an bigger Super Scorpene. With AIP and VLS.
Many reports had speculated that an larger 3000 plus tonnes displacement Russian sub with Brahmos missile /VLS combo would be selected for the P75i. Because of the need to not depend 100% on the West. In a crisis situation the US can get access to all the technology developed by the Europeans. The French cannot resist US pressure. Nor can Germany. Nor can South Korea.
But the Ukraine war has probably upset all calculations. Will Russia be able to recover economically and deliver defence systems if any order is placed.
The indigenous option is the most preferable. But can the design and production agencies deliver. Don't want delays of 5 to 10 years and severe cost escalation. An MDL - L&T collaboration(50% workshare for each) for the indigenous SSK will lower the risk and increase compliance with deadlines.