The French aren't facing a an adversary with a 20 trillion dollar economy with two active 6th gen projects and two active fifth gen aircrafts in its service. The French aren't facing two nuclear armed nations with one having over a 200 fifth gen aircrafts on its borders. The French aren't facing two military force of a combine 4 million personnel across a 1000km border. The French aren't constantly having multiple internal and external security threats with the hopes of infiltration.
Let's stop comparing ourselves to France. The French are an active imperial power with a neo-colonial empire spanning from Africa to little islands in the Indian Ocean. They have no real peer threats.
We on the other hand have a decaying air force. An army that still has problems modernising and a tiny navy relative to its size.
You are relating one wrong thing to another. None of what you said has any bearing to baseline military capabilities.
And the problem is you guys do not understand what the IAF is trying to do. Everbody wants some thing or the other without knowing how it all fits into what they are creating.
India's goal is to establish a global ISR system that can seamlessly integrate all our sensors and effectors into a single unified system with access to the finished information in real time, a global combat cloud, to establish tri-services synergy.
What it means is our entire combat system will be software-driven and not restricted by individual hardware performance.
GCAP is harware-driven and regional. While AMCA will achieve 100% synergy with our network, GCAP won't, it will be restricted to its theater of operations. For example, an AMCA commander over the Arabian Sea can run a UCAV mission over the SCS, whereas a GCAP over the Arabian Sea is restricted to that sea.
So yeah, the GCAP's radar will be superior to the AMCA's, but AMCA will tap into a unified feed of 30+ radars within its sector in real time, rendering the hardware-driven model of the GCAP moot.
There are other areas of NCW too. For example in conditions where terrestrial systems are jammed, a satellite can pick up a previously undiscovered enemy ground unit headed towards our own. The satellite would inform ground control, which will then send that information out to a survivable air asset for surveillance, like an AMCA. The AMCA would then coordinate with the ground units to defeat the enemy units. For example, AMCA will act as a relay to pass on a satellite's targeting coordinates fused with its own supporting sensors like EOTS to an ATHOS artillery system for fire control since the ATHOS' own sensors are jammed.
Another important area is EW and CW. Since everything's going to be software-driven and AI-run, there's a constant need for over-the-air updates to maintain operational capabilities that an individual effector cannot manage on its own. For example if AMCA's radar is jammed, it may need offboard processing coming in from the ground or drones to offset the enemy's superior processing. The same if unknown signals are discovered, then a response needs to be generated in real time and a security update needs to be sent out to all AMCAs.
Basically, GCAP in British hands will be 6th gen, but GCAP in Indian hands will remain 5th gen, with some localized MUM-T. AMCA in Indian hands with a global ISR network and joint C4ISR will give us superior capabilities even relative to GCAP in British hands because GCAP is hardware-driven and won't have the same support structure as AMCA. NGAD, AMCA, and SCAF are software-driven and provide true system of systems capabilities. So GCAP won't add anything to our capabilities.
Anyway the IAF has already announced their plans. They only want LCA, MRFA, and AMCA. Their indigenous plans for the future are a hypersonic jet and/or AMCA NG (as stopgap). And any new stopgap depends on circumstances prevailing during the time, so that means there's nothing new for another decade (2035+). So all foreign 5th gen and higher jets do not matter to India today. Let's worry about it after LCA Mk2 and MRFA production runs are coming to an end and AMCA Mk2's begins, that's when our next plan will be set in stone.
PS: The French have 2 peer threats (direct with Russia and indirect with China) and they are completely blind to the second one (China). We just have to deal with one peer threat and we are still a tertiary threat to them. So we are in a better situation.