I don't think that the web is fundamentally slow! I do think Chromium in particular has become a major resource hog. Firefox, which doesn't have Safari's platform advantage, opens more quickly and takes up much less memory than Chrome (even as it still uses up battery quickly). Gnome Web, a Linux webkit-based browser for Linux, also performs quite admirably, so I'm not convinced Safari's success is simply due to its macOS integration.
There've been a couple attempts to build electron-like frameworks that use the OS's native webview, but they don't seem to have gained that much traction. Deskgap is probably the most mature of them, relatively speaking.
There've been a couple attempts to build electron-like frameworks that use the OS's native webview, but they don't seem to have gained that much traction. Deskgap is probably the most mature of them, relatively speaking.
https://deskgap.com/
https://github.com/pojala/electrino
https://github.com/jscherer92/Quark