The docs says:

withWidth()

This higher-order component will be deprecated for the useMediaQuery hook.

Will this really happen? when and in what version?

I have many class components which mean cannot use useMediaQuery hook. But I really need to keep watch on screen size changes.

Also if Material-UI decides to get rid of withWidth() then why still use it in the demo? as in Responsive Drawer

This makes me confuse unsure to decide, should I just use withWidth() in my class components or should I convert them into functional component -which means a lot of work- to use useMediaQuery.

Does Material-UI plans to drop support for the class component?