Yes. I mean you asked about -- it's true. Some people learn different than others. That is true. But you would be surprised that there are a lot more similarities than differences. The reality is, I mean, this is not just generations, also geographically. I mean we always hear these things about like, "Oh, well, people in that country do that or people in that country do that." What we have found time and again is that not only a lot of people learn pretty similarly, also the things that get people to use the product more are pretty similar across the geographies. I mean like a streak, it works in every country or it's just -- so there's a lot of similarities. So at the moment, you're going to see us just make a better course for the masses that's what we're going to be spending most of our effort on. Of course, the courses do adapt to each individual and probably one of the places where there is most adaptation that is needed is the pace of learning really is different. And it just happens that as you get older, you get slower. That is just -- that's not controversial as somebody who's getting older and slower, I can tell you that. So the pace -- but that's very easy to adapt. We're just -- we really do just adapt to the pace pretty easily, and we've been doing that for a while. Now in terms of the metrics that we're going to be looking for, certainly, user growth is an important metric that we're going to be -- that we're really keyed in on right now, probably the most important metric in the company. So we're going to be looking at that a lot. Now the thing about improvements in teaching, and this is what I was saying before, they don't translate to user growth immediately because if you improve a course and it's much better, over time, maybe people are starting feeling that they're learning a little better, so there's more retention or maybe there's more word of mouth because the people are saying like, it really works for me. Let me tell you about it. So it does translate. We know that improvements in teaching do translate to user growth, but it's not immediate. And this is kind of what we mean by long term. What we're going to be looking at that, there are things like just improvements in learning outcomes, we can measure how well people are learning. And the good news is that really almost every year -- since we started measuring that every year Duolingo is actually teaching better than the year before. We're probably going to see improvements in how well we teach, move faster than in the past because we are taking it -- we're spending more effort on it. So we're probably going to be seeing that and our hypothesis, but it is a hypothesis that I very much believe in, is that, that will translate to user growth. It's just not going to be linear or quick.