It’s likely just sheer difference in quality of engineering. For most companies that choose Electron, performance was never of any value in the first place and

It’s likely just sheer difference in quality of engineering. For most companies that choose Electron, performance was never of any value in the first place and that’s reflected in the engineering regardless of how/what it’s written in. It just happens that bad code is much more egregiously bad with JS/Electron than with other stacks.