Fortunately you can work on shared cloud documents while still having more features and the faster response of local applications. I often work with local Excel or Powerpoint apps on cloud documents while another colleague is working on the same document. If I need to share the document, I just add someone to the share list. If someone emails me a document to work on I switch it to a cloud document and then share it back to them to try to change their habits of sending out discrete copies of documents.