Just yesterday I asked Gemini Pro 3.0 this question:
> Find such colors A and B:
> A and B are both valid sRGB color.
> Interpolating between them in CIELAB space like this
> C_cielab = (A_cielab + B_cielab) / 2
> results in a color C that can't be represented in sRGB
It gave me a correct answer, great!
...and then it proceeded to tell me to use Oklab, claiming it doesn't have this problem because the sRGB gamut is convex in Oklab.
If I didn't know Oklab does have the exact same problem I would have been fooled. It just sounds too reasonable.