It's not that users don't care. They just stop using it at some point. Most people don't know about memory or processor speed but that doesn't mean they will keep using a program that slows down everything on the computer.

In the work environment (non-tech) I experienced several times that people complained about bad usability and apps slowing down the computer. More often than not, those were Electron apps. But the standard corporate solution is to just upgrade computers to 32gb ram and even faster processors. Not sure if the faster development speed in Electron still saves money then.

Don't get me wrong, I think Electron is generally a great idea. VSCode works great. Similar to websites, slow performance is rarely a fault of the underlying technology, it's a result of programmers not caring about performance.