We are currently using a classic Rails stack. We plan to add React for the view part of the website. We are currently using a UI theme called UBOLD, which is built on Bootstrap. Should we move to a different UI theme that is built on Material Design because Bootstrap does not play well with React?
You can use also something like MDBootstrap, which includes Bootstrap and Material Design. This is the link to the React version: https://mdbootstrap.com/docs/react/
I used it for a JQuery project and it works fine.
You can use almost anything you want with React, in the end it just renders out html/css. There are currently two major projects wrapping bootstrap in React components. I have personally used reactstrap and created my own components using bootstrap css and both worked fine.