Oh and... if you want problems specific to Electron... I'm pretty sure Discord was keeping all the cat pictures and memes that it had ever displayed uncompressed, in ram, for a long while. Memory usage of several gigabytes if you had the meme channel open. Even it displayed only the last 3 cats.

It's better these days but it was a problem for years. And tbh I'm not sure they fixed it or even realized or cared about the problem or one of the 2498127 npm packages fixed it.