To add some more details, the fundamental challenge here is that every new stock adds operational costs and complexity, so we want to optimise the list to be what our users want. We also need to consider the impact on user experience as there’s only so many stocks that we can add to the list in Discover (we’re at 250+ now) before it takes a very long time to scroll through them!
So we’ll be reinventing Discover in the future. And despite those considerations, as our user base grows dramatically, we’ll add more and more stocks.