It's also worth noting that the NaCl and PNaCl teams were integrated into a large Wasm team at Google and brought their expertise to the project. While we didn'

It's also worth noting that the NaCl and PNaCl teams were integrated into a large Wasm team at Google and brought their expertise to the project. While we didn't all 100% agree on every decision made in Wasm design, we were intimately familiar with the tradeoffs made by those prior projects. Ultimately the sandboxing requirement of running in-process with the renderer process and integrating with Web APIs like JS dictated hard requirements for security.