I don't think there's any guarantee that browser vendors will continue to support WASI 0.1 indefinitely; Once multiple versions of the standard are in play, codebase supporting them simultaneously explode in size. None of this gets into the likelihood that, once WASI hits 1.0, the prior versions very well could be "retired".
And keep in mind that the perspective of the author is that things will only get worse from hereon, with regard to WASM.
And keep in mind that the perspective of the author is that things will only get worse from hereon, with regard to WASM.