Ultimately it’s an issue of stable battery energy-density. Present electric aircraft are much slower and shorter range than fossil fuel powered ones. It’s a gamble when the next generation of batteries will become viable (several promising avenues of research, but R&D is always something of a wildcard). But it will happen. Chemistry and nature has shown us it can be done. It’s an engineering challenge, no breakthroughs in fundamental physics required. And the economic incentive is vast, inexorable and increasing over time.
