A big thanks to the 19 contributors who made this release possible. Here are some highlights ✨:

• 🔥 Converted 3 more Material UI components to use Pigment CSS. Current progress is 36%!
• 🚀 Added a spacing CSS variable to the Material UI and Joy UI themes.
• 💫 Added 3 redesigned free Material UI templates: Sign-in, Sign-in side, and Sign-up.

@mui/material@6.0.0-alpha.1

• [AppBar] Convert to support CSS extraction (#41247) @mnajdova
• [Badge] Deprecate components and componentsProps (#41655) @skmanoj322
• [Button] Convert to support CSS extraction (#41378) @siriwatknp
• [ButtonGroup] Convert to support CSS extraction (#41666) @zanivan
• [RadioGroup] Apply classnames (#41610) @ZeeshanTamboli
• [Slider] Move palette styles to the bottom (#41676) @siriwatknp
• Add the spacing theme token (#40224) @siriwatknp

@mui/system@6.0.0-alpha.1

• Add the spacing theme token to be used in theme.spacing() (#40224) @siriwatknp

@mui/codemod@6.0.0-alpha.1

• [codemod] Setup v6 codemod structure (#41668) @DiegoAndai

@mui/lab@6.0.0-alpha.1

• [TabPanel] Add keepMounted prop to match Joy UI (#41651) @ppaskaris-plooto

@mui/joy@5.0.0-beta.34

• Add spacing theme token (#40224) @siriwatknp

@pigment-css/react@0.0.5

• Improve sx prop support (#41589) @brijeshb42
• Fix Emotion styled error (#41699) @siriwatknp
• Fix propTypes removal during eval stage (#41695) @brijeshb42
• Fix props forwarding (#41688) @siriwatknp
• Fix sx prop transformation on Box (#41705) @brijeshb42

@pigment-css/vite-plugin@0.0.5

• Use constant filename for pigment styles (#41667) @brijeshb42

@pigment-css/nextjs-plugin@0.0.5

• Add missing RTL implementation (#41751) @brijeshb42

Docs

• [pigment-css] Update README.md installation to use the next tag (#41649) @mnajdova
• [pigment-css] Add "Building design system components" guide with Pigment CSS (#41635) @siriwatknp
• Continue migration of Base UI to sperate repository @oliviertassinari
• Stick to one way to write IE 11 @oliviertassinari
• Fix typo in CONTRIBUTING.md (#41670) @adriancuadrado
• Drop IE 11 official support (#41611) @iammminzzy
• [material-ui] Fix typo on the Accordion page (#41687) @connorshea
• [pigment-css] Add small edits on the README (#41646) @danilo-leal
• [pigment-css] Edit the example app's README files (#41639) @danilo-leal

Core

• [code-infra] Move BrandingProvider/brandingTheme/InfoCard to @mui/docs (#41206) @Janpot
• [core] Automate cherry-pick of PRs from next -> master (#41741) @aarongarciah
• [core] Update the prettier script to use the next branch (#41637) @mnajdova
• [docs-infra] Skip loading source for non-editable modules (#41588) @bharatkashyap
• [docs-infra] Vale rule for M3 (#41737) @oliviertassinari
• [docs-infra] Allows to remove edit button (#41702) @alexfauquette
• [pigment-css][examples] Add example project with Remix (#41700) @brijeshb42
• [examples] Update MUI's packages to the next version (#41701) @mnajdova
• [material-ui] Refine the Sign-in and Sign-up templates (#41192) @zanivan
• [test] Add test to display options provided to the options prop even if loading is true. (#41675) @ZeeshanTamboli
• [blog] Refresh the design slightly (#41697) @danilo-leal
• [website] Use en-US over en-UK for career link @oliviertassinari
• [website] Add Aarón to About Us (#41736) @aarongarciah
• [website] Refine button design and other details (#41686) @danilo-leal
• [website] Improve job og image (#41672) @oliviertassinari
• [website] Page <title> should have no dots @oliviertassinari

All contributors of this release in alphabetical order: @aarongarciah, @adriancuadrado, @alexfauquette, @bharatkashyap, @brijeshb42, @connorshea, @danilo-leal, @DiegoAndai, @iammminzzy, @Janpot, @JCQuintas, @levigunz, @mnajdova, @oliviertassinari, @ppaskaris-plooto, @siriwatknp, @skmanoj322, @zanivan, @ZeeshanTamboli