I currently use an old macbook from 2014. Everything is slow and I can't have too many applications open at once. But vscode is still one of the snappier ones and I don't see those keystrokes issues.
Of course you can always go less powerful but at one point you just can't use all more complex editors. It's not an electron issue.
Vscode struggles with intellisense and vm round trips on my older cpu. Feels like a race between displaying the character I just typed and displaying suggestions. Sometimes.
to be fair, it's possible that I also experience this from time to time. Since it's an old laptop, sometimes things are slow and I have to wait a bit for intelligence to initialise and cache results. But generally, especially if I close most other programs, it feels reasonably snappy and I don't have the displaying issue.
Of course you can always go less powerful but at one point you just can't use all more complex editors. It's not an electron issue.