I still have my old one. I used to use it to stream Steam to my living room TV, since my gaming PC was in my office on my second floor. The wife wanted to hang out, but she'd always be distracted on her phone and there wasn't room in my office for us to comfortably sit together, so I'd game from the TV while she sat with me on the couch.

I haven't used the physical Steam Link in a few years, though. My newest Smart TV has a Steam Link app on it, which does everything the physical device did. Maybe that's why the physical one still gets updates; because the software is still being supported as a TV app.