[nGaR5zKE]

Well, at first I also didn't like it, but I found its benefits:

1) old things do get repeated - but not like you having to jump back in the path, but by introducing things to repeat inside the current lessons. And you still have the "weights" button to practice manually if you wish to

2) what you used to have on one level in the three (e.g. three lectures on the same row) and you had to learn them one by one or mix them manually, now gets automatically mixed for you. This makes learning harder, since to get the purple level, you have to complete the purple challenges of several lectures mixed all together

3) levels in the new path are just spaces where you learn a concrete new thing. But lessons from previous levels get mixed into the new one. So it is like learning a new layer of your tree AND practicing the previous layer at once.