Google Maps has the same issue. Their trick is to pass a ton of the data as protobuf, then decrypt it in WASM and load it into WebGL to render and interact with

Google Maps has the same issue. Their trick is to pass a ton of the data as protobuf, then decrypt it in WASM and load it into WebGL to render and interact with. Whilst all a massive pain, you can still scrape it with raw obj dumps from the GPU. So it's always a & game.