I have been tracking the progress of fusion power generation since I was in high school in 1962. Since 1962, we have “always” been just 5 years away from a practical fusion system.
On earth it seems to work best as an explosion. But nobody would get buy-in for a plan that involved periodically setting off a fusion bomb then harvesting as much of the energy as possible somehow.
Probably not in our lifetime. Fusion is always “just around the corner”, but it somehow never quite gets here.