There’s still plenty of inefficiencies to criticize.

• Electron apps bundle an entire browser dedicated just to running the app. That takes up storage space and requires loading multiple instances of electron in memory if you’re running multiple electronic apps. Would be better if these apps could all share the same dynamically linked Chromium instance to run. Web apps are a decent alternative, but can lack desktop integration.
• Rise of interpreted languages like JavaScript, though this is mitigated by JIT compilation.