I don't like to blame Russia because they are stuck in their own situation vs the west/China. Russia was the only one to supply India weapons at a time when India was under sanctions by the west; so it's better to keep them on friendly terms instead of pushing them into the China camp. It's just that their technology is outdated, so their engines are less reliable.You can bet on GTRE developing a better engine than russkies for sure. All the russkie did was use us as cash cow and milk us to every last drop of blood forget milk
But it would be interesting to see what GTRE come up with. I've heard they have recently made progress on single crystal blades and other high temperature components.