I think Umbraco needs a template market. Or at least a really good repository of starter templates that could be modified.

Please feel free to install UmBootstrap - it uses the latest version of Bootstrap with CSS Grid enabled to compliment Umbraco Block Grid. The SCSS files can be customised as much as you like: https://umbootstrap.com/

I've had "build a bunch of starter kits based on free website templates" (just like Pauls Clean Starter Kit) on my package list for a bunch of years. But as you can see on the marketplace - I haven't started yet 🙂