Yeah... I agree with you... Perhaps, an improved 4th gen engine will be enough for us because our main adversary will continue to rely on their 3rd Gen + engines like WS15 till 2040s even in their 5th & so called 6th gen aircrafts... What we need is development of atleast 2 major Companies in aero engine segment who will not only absorb and manufacture on the basis of TOT from Engine JV with foreign OEM, but also they'll have a proper R&D infrastructure to further develop the absorbed systems... Personally I feel that we can't rely on GTRE, DRDO solely because of various reasons for example - lower efficiency, zero competitiveness, zero urge for Market driven effectiveness.