As you said, it’s cheaper and very effective way to force enemy to switch off its radars in fear of ARM attack.
I brings new ways to do SEAD and DEAD ops
We must integrate our own NGARM (aka Rudram 1) to Rafale and all other platforms for mission flexibility
It's not a new way. It's 70+ years old, first created during WW2 but never used. What the Rafale does is new. NATO fired thousands of ARMs during the Gulf War on Iraq. So it's a very expensive tactic. It was only after that that the US realised stealth is the way to go for SEAD/DEAD.
Anyway, NGARM will likely be integrated with our Rafales based on pilot input, as well as a dozen other Indian weapons in development.