assuming you use chrome, electron will reuse the chromium libraries, so the net increase on memory is not that large. with Tauri, it will have to spin a new set of (memory hungry) browser libraries(i.e. libwebkit2gtk on linux, similar stuff on Mac and Windows) that are all new memory usage on top of chrome(nothing to share), not to mention the libraries Tauri uses are not as "modern" as Chromium on html5/css/js/webapi support.
No, Electron cannot reuse Chromium libraries. Every Electron app bundles and loads its own copy of Chromium; it’s bound to that specific version and can’t share it with any other app. Also, Chrome isn’t Chromium; it may be compiled from the same code, but that doesn’t allow the OS to substitute one for the other.
you're correct, the chromium part is indeed statically linked, my only argument will be that html/css/js/webapi support, where chromium is more complete than whatever Tauri uses on each platform. for that alone, I will bear with more memory/cpu. plus there are more developers good at js than Rust.
I still feel Electron is the best approach now.