Understanding where to put a bunch of class names is a lot easier than understanding CSS. Bootstrap isn't really about working around CSS, often it's about avoiding it. CSS Grids will likely just make Bootstrap easier to use, maintain and extend.
I personally stopped using Bootstrap years ago when I gained a good understanding of CSS. The most common features that Bootstrap provides (components and layouts) are not hard to implement yourself. And you'll avoid littering your markup with brittle combinations of class names and nested <div>s.
I personally stopped using Bootstrap years ago when I gained a good understanding of CSS. The most common features that Bootstrap provides (components and layouts) are not hard to implement yourself. And you'll avoid littering your markup with brittle combinations of class names and nested <div>s.