Re: [w3ctag/design-reviews] WebXR Hand Input API Specification (#568)

> Regarding a structured API - could you expand on the implication for accessibility?

As mentioned earlier I'm wary of designing anything that can handle users with uncommon hand configurations (e.g. polydactyl users) until we have accessible device APIs that this can be built and experimented on. It's reasonably easy to design things without closing the door to future improvements for the unstructured API, but the more structure we introduce, the more assumptions about the hand we introduce. Ideally, such a structured API would handle changes in hand structure. I would rather not close these doors, which is why I'd like to start with the unstructured API.

I'm not fully against adding a structured API -- I think it would be pretty nice to have -- but I'm mostly comfortable letting frameworks handle this right now.

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