I can work productively on my 6yo notebook with 4 GB RAM, because a terminal, CLI tools, vim and a browser covers my needs. If I had to use Electron apps, I'd probably have to look into buying a new notebook, which is quite wasteful both on the money side and on the material resources side of things.

Some developers will probably need more than that because of the resource demands of their specific fields, but other than that, 640 KB ^W^W 4 GB should be enough for everyone.