> They would have to rewrite the app and use Tauri/WebView2 or native code. CEF blows up your memory use because you ship a whole ass Chromium browser.

The only benefits of Tauri are the smaller application package and the fact that the runtime is always up to date (which can also be a downside). That full package doesn't live in RAM when it's running, so it's "merely" wasted disk space and not RAM. In terms of RAM it uses just as much as electron or CEF.