Reddit seems to have added a `[show replies]` button on threads.
// ==UserScript==
// @name Reddit Auto Expand Replies v1
// @namespace Reddit Auto Expand Replies v1
// @match *://reddit.com/*
// @grant none
// @version 1.0.0
// @author brian6932
// @license MPL-2.0
// @description Reddit seems to have added a `[show replies]` button on threads.
// ==/UserScript==
// jshint esversion: 11
for (const selector of globalThis.document.querySelectorAll('.showreplies'))
selector.click()