Personally I am not happy with this decision. The permissions required for the new feed in the Modern experience is not acceptable for most organisations, giving design access to a page just so you can post items back and forwards. Teams does not integrate well with an intranet and a lot of organisations do not wish to implement Yammer as it is taking people to multiple applications. So Microsoft are taking away a very useful and often used master feature of SharePoint and replacing it with things that just do not work the way organisations wish them too. The New sites (new team site and communication site) leave a lot to be desired around permissions and functions so cannot yet be used. People please vote up keeping the new feed working as it is heavily used and vital. The number of implementations out there using it that now need serious planning and training is just way too much to deal with.