Ask HN: Is HTML File Upload still needed for uploading files to server?

I am working on an application for those in the media business; my users need to send files to my server for processing. I am wondering if I should support form file upload from local drive vs letting users use Google Picker/ Dropbox picker to select files which my application can pull later.

I am asking this there is a wide spread adoption of Dropbox, Google Drive etc. and the fact that apple devices do not support file upload.