Yeah, let's change it to a specific alpha tag.

It is indeed a bit tricky. To be honest, the whole tutorial is tricky. It is almost completely based on unstable features. On the other hand, it is one of the best parts of the docs for beginners currently. That's the reason it is in there.

We might want to check it and see what we get if we remove unstable features for the tutorial. Then we can keep the "old" tutorial in the `dev` branch and merge it when the features are stable.