Re: [w3ctag/design-reviews] COOP same-origin-allow-popups-plus-coep (#649)

Hi @camillelamy - just seeking some clarification on this problem statement that starts off the explainer.
> Sites that wish to continue using SharedArrayBuffer must opt-into cross-origin isolation

Can you please start off by articulating the user need - what this is all in aid of when it comes to the end-user experience? I understand that some sites wish to continue to use SharedArrayBuffer in these circumstances. Why? How does this meet a user need and/or in what way is the user experience degraded if they are not able to? I'm trying to understand the actual scope of the problem and the actual user need you are trying to address.

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