Lots of organizations have a blanket ban on any third-party software that wasn't specifically approved by IT. Being free might help it get cleared but that's nowhere sufficient. Since Notepad comes with Windows, it's probably always there and never banned. (Although of course the cloud-based LLM integration might actually be a problem.)

With that said, I think I've also had NotePad++ made available by IT at all employers and clients that had me use Windows even when the desktop setup was otherwise quite restricted. It's a rather established tool after all and probably considered a safe and reputable bet even by somewhat conservative IT leadership.