Looking at the memory utilization of my VS Code installation with all of the extension I have is currently using just shy of 200MB. Most entry level laptops today come with 8GB of memory. 200MB out of the 8GB is ~2.5% of the total memory available. If you have 16GB that drops it down to ~1.25%. Yes, vim will use much less memory but let's not pretend you're going to be using all of that memory doing something else (and if you are, you're the edge case). Most of the time it will stay idle, you might as well use it if it's a program you're more comfortable and productive with.
I'm not saying that I'm OK with the amount of resources Chrome and Electron apps utilize but the argument that we don't have enough memory for a few of them, specifically the ones that you use on your day-to-day work is honestly not a strong one.