Why were partials removed from Pinegrow?


I am new to Pinegrow (used Dreamweaver in the past) my question, why was partials removed from latest version of Pinegrow? I split my code into multiple files, i.e. head.php, navigation.php and footer.php. Code that is common to all pages are separated out. Occasionally, it would be nice to be able to edit & view everything properly so that it is WYSIWYG (fully assembled view) without needing to view it in a browser using a localhost php server.