Alyx was incredible though! Way more than a tech demo (though I get the argument that it was a test to see if folks would pick up a VR Half-life 3). I played it on a cheap, used WMR headset and an old PC that could barely keep up, and it still stays in my top five videogaming experiences.
It's a great example to bring up though, because I'd bet it wouldn't have been made if the studio was only chasing money instead of trying to innovate.