Webpack contains its own typings in the form of

https://github.com/webpack/webpack/blob/master/types.d.ts

The README states

Removing a package
When a package bundles its own types, types should be removed from Definitely Typed to avoid confusion.

You can remove it by running npm run not-needed -- typingsPackageName asOfVersion [libraryName].

Unfortunately, removing @types/webpack as of 5.0.0 cause many other typings to fail.

So I'm wondering what is the correct way in this situation. I created a Draft PR for this removal.

#49755

I opened this issue as a discussion on what is the best approach for updating these typings.