Worth it for both veterans wanting to revisit it all and newcomers who don't know what an Adventure Line™ is, it's a short game just like it used to be but it has a bit more stuff bookending it now which in my opinion blends really well with the themes and humor from back in the day.
You can see the Stanley Parable as deep and thought-provoking, or contrived nonsense, or both, and it's a good time whatever way you choose to play it.