One can hope that the code of the engine will be shared across apps in memory, thanks to shared libraries, and that the engine itself will use shared things too, by virtue of being distributed with the OS.

... if you happen to run other browsers and apps using this WebKit / libwebkitgtk / webview.

and that embedded apps won't be obese frontend code with bazillion npm dependencies and a heavy, all too widespread framework, of course.

Hopefully, developers turning to Tauri will have some sensibility to lightness.