The macbook air only has up to 16GB of memory right now. There's plenty of cases where one might want to run a javascript script on their laptop which uses quite a bit of memory, and they'd rather it complete at all, even if it's a bit slower.
My browser is already eating half of the 16 GiB of RAM I have on my laptop. I definitely don't need random small command-line tools which eat >300 MiB of overhead each. So far I am a happy non-user of Electron apps.
