Glide Modal Forms are a great way of avoiding confusion with users struggling with "insert and stay" as they make it abundantly clear that a new record has been created. Angular modal windows look great and allow you to avoid any Jelly XML madness.

In this example, we'll use the GlideModalForm API to clone a change task (replacing the OOB version). The advantage of this method is we can (1) automatically change values like the state, as who wants to clone a closed task to become another closed task and (2) we can give the user the opportunity to update values as needed.

Here's our code

function copyCurrentTask() {

    //isolate script needs to be disabled for this script to work as we need access to jQuery
    var jQuery = this.jQuery;
    //find all the elements visible on this page
    var allFields = jQuery('[id*="element."]');
    //the table name will always be the middle of the id (for example, element.incident.number)
    var thisTable = allFields[0].id.match(/element\.([\S\s]+)\./)[1];
    var valuePairs = '';

    //Loop through the fields and build up a list of values to be displayed on our cloned record
    this.jQuery.each(allFields,function(field){
        var fieldName = allFields[field].id.replace('element.'+thisTable+'.','');
        var fieldValue = fieldName=='state' ? '1' : g_form.getValue(fieldName);//we always want the state to be open (no point cloning a closed record)

        if(fieldName !='number' || fieldValue!=''){
            valuePairs+= fieldName + '=' + fieldValue+'^';
        }
    });

    //Use Glide Modal to display our cloned form
    var d = new GlideModalForm('Copy Change Task', thisTable,glideModalComplete);
    d.addParm('sysparm_query', valuePairs);//here's where we pass our values to the modal record (which would otherwise be blank)
    d.setOnloadCallback(glideModalOnLoad);
    d.render();

    function glideModalOnLoad(glideForm){
        //On Load we want to hide the "Copy Task" button to avoid any confusion
        jQuery("#dialog_frame").contents().find("button:contains('Copy Task')").css('visibility','hidden');
    }

    function glideModalComplete(action_verb, sys_id, table, displayValue){
        //On complete, we want to navigate back to the previous screen (which will be the change record itself)
        g_navigation.openRecord('change_request', g_form.getValue('change_request'));
    }

}

I've attached the UI Action to this article, but please be aware, this will overwrite the default action (which is server side rather than client side)

Have fun