So I don't think fossil fuelds will completely go away. It's just that most use cases will be eliminated once there is a cheaper and equially suitable method of

So I don't think fossil fuelds will completely go away. It's just that most use cases will be eliminated once there is a cheaper and equially suitable method of power generation. I strongly believe in the future of solar power in general because it's relatively low-tech and reliable. There are no moving parts (other than maybe turning an array to face the Sun while it moves across the sky but this isn't strictly required). So solar power can provide power in a lot of places where it's either impossible or infeasible to build infrastructure (eg remote places, war zones). But once solar power source (or something else) is cheaper than burning oil, gas or coal you can use that power to make fossil fuelds by sequestering carbon from air. That's not that difficult but we don't generally do it because it makes little economic sense. But this method would make fossil fuelds essentially carbon neutral. So there are vehicles that won't make sense to be replaced with EVs. Likewise, there are places where burning fuel may still make snese. Solar power may not make sense in jungles or hurricane zones so there may be continued use of generators. I can't speak to the specifics of Rarotongo. In general though, I think the technology and infrastructure will be truly transformative on a massive scale.