I don't think that is correct. The extent to which Electron uses resources today is as if you install five copies of Node.js and five copies of Chrome and launch them all.

A common runtime would be as if you ran five Node.js apps using the same runtime and opened five tabs in a single instance of Chrome.

I'm not super well versed on the low level implications there, but I find it hard to believe that wouldn't save a lot of resources.

I mean, do .NET apps load up a full copy of .NET and all its libraries into memory for each app you open?