I've built secure-electron-template [0] which is a secure-by-default Electron template for writing apps. I made it open source because I'm not motivated to build this for a profit (then it becomes work). The project is sustainable because it's a template, and once people decide to use it, they make their own changes to their app. It's assumed a template is, a template. This doesn't make me any extra work besides fixing bugs here and there or improving things at my own pace.