Seems to me there is a religious belief that green energy must replace all forms of energy production. However, as with most cults, reality ultimately prevails and a more level headed world emerges.
Assuming that fossil fuels will not be used in the future is utterly unrealistic. Rather, a middle-of-road pragmatic energy mix will win out as the radical fringe is thrown to the side of the road. The economic and environmental stupidity of their irrational green energy policies are becoming painfully obvious to all with every passing day.
As far as gas turbines are concerned, the machines are exceptionally operationally flexible and can readily adapt to using some hydrogen. The machines will continue to be used to meet our energy needs more or less following todays patterns. Technological gas turbine advancements will continue to improve financial and environmental performance.