It's faster to start, faster to build, but not faster for pure web, most of time is slower than electron except for windows, because webview2 and electron using the same core. But if you replace some of your app function by bridging to rust, it's blazing fast.
As it is written in rust, I believe this is a legal requirement.
also, don't forget: it is safe.
More like a required dependency.
electron ships with own browser so each app is like running a separate chrome* instance but this a wrapper around systems webview.