Oh hey, some weird niche thing I was complaining about got fixed and now firefox can natively interpolate gradients in OKLAB/OKLCH: https://bugzilla.mozilla.org/show_bug.cgi?id=1861363
There's a couple demos on this page (note the lack of a fallback gradient): https://developer.mozilla.org/en-US/docs/Web/CSS/color-interpolation-method
What does this mean for you? It's now easier to use CSS to draw more visually pleasant gradients. No more fiddling with extra stops to reign in inexplicable changes in brightness, saturation, or hue, It Just Works.