Re: [csswg-drafts] [css-fonts-4][css-nesting] Nesting of @supports inside @font-face and font technology feature queries (#6520)

> In the second example, if the browser doesn't understand the new syntax, or "COLRv1", the entire src line falls back wholesale.

No, that is actually the reason we went for that syntax - the second src (or the second comma-separated item, if you did it that way)  is dropped but the first remains, so in older browsers you end up with

```css
@font-face {
    font-family: jewel;
    src: url(jewel-fallback.woff2) format("woff2");
}

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