Since MUI v5 (Material UI) was released, I've started a new project with it. But as it's a brand new version with breaking changes, I couldn't find an example project that I'm fully satisfied with.
So I felt inclined to create one with the most basic features that I would use myself. The result is on my Github (link below).
It features a standard folder structure as generated by
create-next-app and the leanest usable ESLint + Prettier configs for linting/formatting.
If you like my work, please give it a star to let me know it's useful to you :)