Kill Electron would be the bigger fear. I know a lot of people don’t like it, but it has enabled so many more applications for Linux that killing it would be a major blow.
That's very different from killing it, but it could make developing or supporting Electron apps more difficult - plus the fear that it could then start sliding down the slope of the Windows version getting more investment, eventually leading to the classic "it's best on Windows" embrace/extend platform lockin. I'm not betting on that being their play, but I could see how people would worry...