tl;dr: MacOS 26 (Tahoe) forced all app icons into a uniform squircle shape, shrinking non-compliant third-party icons into an "icon jail" with gray backgrounds and reducing visual distinctiveness—a particular problem for accessibility and quick recognition. Early MacOS 27 (Golden Gate) betas show Apple walking back some Liquid Glass excesses on their own icons, and the author urges Apple to go further by lifting the squircle restriction and letting third-party icons have distinct shapes again.