Thanks, I have heard this from a bunch of people. To be honest, as a non-math person, my initial reaction was that it's not that important because on Medium, the words are the core way to communicate ideas, and workarounds (like screenshots) seemed sufficient, though not ideal, because I see successful math-oriented publications. But as I've talked to more math folks (in comments here and via email) about how integral LaTex capabilities are and how helpful this would be, I've changed my mind and think we should look into it. This is not a promise that we're going to roll it out next week, but we are actively scoping it and seeing how much eng work or other work it would take to make it happen. So, thanks for helping me deepen my understanding. If we roll it out, I will likely steal the phrase "math mode". Medium: Math mode! is cool.