The average electron program has very little data to work with and not a lot of hard algorithms to run, yet still feels sluggish, that's the main complaint here
However, I notice a significant difference in responsiveness between VS Code and Sublime Text -- enough that I changed my workflow back to Sublime Text because the very slight latency difference annoyed me. So I do think there is a baseline difference between the frameworks used by those two apps that no amount of optimization can overcome. It's sort of like the acceleration difference between a truck and a sedan: sure, powerful trucks can sometimes out-accelerate anemic sedans. But if you put a similar drivetrain in both vehicles, the vehicle with less mass (or memory footprint, in the framework analogy) is going to win.