A big thanks to the 12 contributors who made this release possible. Here are some highlights ✨:

• ⚡ Rendering performance improvements

@mui/material@6.0.0-rc.0

Breaking changes

• [Box] Remove component from BoxOwnProps (#43384) @DiegoAndai

  The component prop has been removed from the BoxOwnProps as it is already included in the Box type. This might affect your code if you are using the styled function with the Box component. If this is the case, use a div element instead of Box:

  -const StyledBox = styled(Box)`
  +const StyledDiv = styled('div')`
     color: white;
   `;
  

  This yields the same end result. If this doesn't work for you, you can also cast the styled returned value to typeof Box:

   const StyledBox = styled(Box)`
     color: white;
  -`;
  +` as typeof Box;
  

Changes

• [ListItem] Remove unnecessary TypeScript test (#43359) @sai6855
• Skip generating CSS variables for a custom spacing function (#43389) @siriwatknp
• Revert visual regressions from #42283 (#43364) @ZeeshanTamboli

@mui/codemod@6.0.0-rc.0

• Add Grid2 to removeSystemProps codemod (#43302) @DiegoAndai

Docs

• [blog] Add video to the Pigment CSS blog post (#42500) @oliviertassinari
• Fix broken link to milestones (#43379) @oliviertassinari
• Update CSS theme variables related content (#43130) @siriwatknp
• Fix link to createTheme source (#43332) @oliviertassinari
• Add cache to avoid unnecessary jsx dynamic import and theme getting (#43139) @Vxee
• Fix broken link to Next.js docs @oliviertassinari
• [material-ui] Revamp Composition guide (#43266) @ZeeshanTamboli
• [material-ui][Menu] Replace PaperProps with slotProps.paper in demos (#43354) @sai6855

Core

• [code-infra] Change docs:start script to serve the exports folder (#43375) @Janpot
• [core] Fix typescript-next CI workflow (#43394) @aarongarciah
• [core] Run @mui/system TypeScript module augmentation tests in CI (#43386) @ZeeshanTamboli
• [core] Enable manage-package-manager-versions pnpm flag (#43366) @aarongarciah
• [core] Replace indexOf with includes (#42883) @k-rajat19
• [docs-infra] Add GitHub source link to components (#43228) @Jay-Karia
• [docs-infra] Fix copy shortcut (#43361) @oliviertassinari
• [perf] Remove theme/styling allocations (#43372) @romgrk
• [perf] Improve composeClasses (#43363) @romgrk
• [perf] Remove system allocations (#43306) @romgrk

All contributors of this release in alphabetical order: @aarongarciah, @DiegoAndai, @Janpot, @Jay-Karia, @k-rajat19, @oliviertassinari, @rluzists1, @romgrk, @sai6855, @siriwatknp, @Vxee, @ZeeshanTamboli