Earlier quoted context omitted.
Is there anything different today concerning software that makes his old words obsolete? > before the web, the explosion in javascript https://www.gnu.org/philosophy/javascript-trap.html
The fact that "JavaScript won". You can't put that genie back in the bottle. The FSF could have been at the forefront, providing support and useful code under the GPL and LGPL. Instead very little web code is under their licences, because their leader won't interact with the modern web. I teach CS undergrads, and they in the main don't even know what RMS and the FSF are.
FSF cannot write all code in the world, this is relatively small organization. They do provide a lot of support AFAIK and explain how to make your javascript free. AFAIK Discourd forums and Mastodon are examples of free-javascript websites.