We wondered the same thing. But the truth is, we developers use really good machines. I myself, use a Macbook pro with 8GB RAM and most importantly SSD. VSCode’s major user-base uses machines with really good configurations because development making your local machine a server. There are a lot of performance issues in VSCode also for lower configuration machines. But considering everything, VSCode developers have done a truly remarkable job in terms of making the IDE light and awesome.