Genuinely curious: what are you working on that makes POSIX compatibility important, but also warrants using Wasm instead of just building native executables?

Genuinely curious: what are you working on that makes POSIX compatibility important, but also warrants using Wasm instead of just building native executables? I ask because I'm personally much more excited about the future of WASI, because it brings so much to the table that it feels like it's actually worth the effort of building something new — I see it as a game changer. I.e. what you appear to view as an unnecessary diversion, I see as the whole point. So I'd love to understand more about your perspective and use case.