I've been looking for simple themes similar to https://bootswatch.com/ for material-ui.
By "simple" I mean just the JSON/POJO that needs to be fed in createMuiTheme. It can contain any overrides of Global styles but preferably no component wrappers or other react jsx/tsx code.
Am I missing any technical reason why such a basic theme collection does not exists ? Are global styles considered bad practice with material-ui ?