A big thanks to the 16 contributors who made this release possible. Here are some highlights ✨:

• ✨ Stack component is added to MUI System and Joy UI #33760 #33800 @mnajdova
• ✨ Breadcrumbs component is added to Joy UI (#32697) @hbjORbj
• Many other 🐛 bug fixes, 📚 documentation, and ⚙️ infrastructure improvements

@mui/material@5.10.0

• [Grid] Prevent crash if spacing is set to zero in theme (#33777) @PunitSoniME
• [Grid] Export interface RegularBreakpoints to fix type error (#33751) @ZeeshanTamboli
• [Skeleton] Add rounded variant (#33687) @siriwatknp
• [Stepper] Fix classes for icon container (#33734) @pratikkarad
• [TableCell] Enable size prop overrides via module augmentation (#33816) @brentertz
• [Tooltip] Fix tooltip arrow css var background (#33753) @TimoWilhelm
• [useScrollTrigger] Add passive flag to scroll trigger event listener #32437 (#33749) @Dsalazar1685

@mui/system@5.10.0

• Fix unnecessary styles created from sx (#33752) @siriwatknp
• Fix duplicated styles in Box (#33774) @iamxukai
• Don't spread props to DOM for string tags (#33761) @siriwatknp
• Add Stack component (#33760) @mnajdova

@mui/joy@5.0.0-alpha.40

• [Stack] Add new component (#33800) @mnajdova
• [Breadcrumbs] Add Breadcrumbs component (#32697) @hbjORbj
• [Card] Fix wrong api description for size prop (#33862) @hbjORbj
• Miscellaneous fixes (#33796, #33750) @siriwatknp

Docs

• [docs] Create, revise, and expand System "Getting started" docs (#33503) @samuelsycamore
• [docs] Test new image best practice @oliviertassinari
• [docs] Fix typo in the ClickAwayListerner name (#33813) @pawelsmigielski
• [docs] Fix link to Basics section in Trap Focus docs (#33772) @ZeeshanTamboli
• [docs] z-index added in popper when used by split button (#33763) @PunitSoniME
• [docs] Improve the guide for using @mui/base with Tailwind CSS (#33670) @mnajdova
• [docs] Fix warnings related to Next.js' links (#33693) @mnajdova
• [docs] Add notification to aggregation blogpost (#33745) @joserodolfofreitas
• [docs] Add Grid version 2 docs (#33554) @siriwatknp
• [examples] Fix NextLinkComposedProps type error (#33842) @adham618

Core

• [blog] Add social card to Tenerife retreat post (#33764)
• [blog] Fix blue outline bug (#33707) @oliviertassinari
• [blog] Improve the width of the layout (#33706) @oliviertassinari
• [core] Remove unnecessary packageName attribute from pages (#33488) @cherniavskii
• [core] Remove duplicated CODE_OF_CONDUCT (#33702) @oliviertassinari
• [core] Update Playwright packages together (#33737) @michaldudak
• [website] Fix notifications not being marked as read in production (#33756) @cherniavskii

All contributors of this release in alphabetical order: @adham618, @brentertz, @cherniavskii, @Dsalazar1685, @hbjORbj, @iamxukai, @joserodolfofreitas, @michaldudak, @mnajdova, @oliviertassinari, @pawelsmigielski, @pratikkarad, @PunitSoniME, @siriwatknp, @TimoWilhelm, @ZeeshanTamboli