They absolutely do not. In fact, relatively few do. Every single Electron app (which is a depressing number of apps) is a bloated mess. Most web pages are a bloated mess where you load the page and it isn't actually loaded, visibly loading more elements as the "loaded" page sits there.

Software sucks to use in 2025 because developers have stopped giving a shit about performance.

Having worked on similar solutions that use Java and Python, I can't say I agree (the former obviously being much faster).

This is so true, and yet. . . Bad, sluggish performance is everywhere. I sometimes use my phone for online shopping, and I'm always amazed how slow ecommerce companies can make something as simple as opening a menu.