Try to open a large text file in VS Code and watch it grind to a halt. While VS Code offers a buffet of features that are cool and convenient it has a lot of problems.
I find I occasionally look at "huge" text files in my day job, but they're almost never source files -- so I don't need syntax highlighting, jump to definition, etc.
Is this something you do often in your C++ development?
I work with data, so it's not uncommon to load a large file either deliberately or accidentally. Highlighting isn't the issue. Even a CSV on the order of 100-200MB kills VS code dead. I assume this is because it's an electron app. Other apps do not have this problem.