Other solutions get a lot right, but I don't know if I will ever use something other than LaTeX. Nothing gets math typesetting feeling so right. The justification and bin packing feels right. I might be esoteric for it. Maybe I care too much about things looking excellent. Maybe Claude is just good enough at debugging anything I'm facing. But I'm not interested in anything realtime/live if it means giving up on output quality. Overleaf has a live preview mode right there. I think a lot of the "problems with latex" are actually just problems with people developing packages in isolation in a decentralized manner. I don't care for LaTeX the language, or its implementation, but I do care for the output a whole lot, in a way that not the font alone or any approximation can reach. Maybe it's just inside baseball and people don't care about advanced typography. If I'm working on a piece of research that will carry my name on it, waiting for that compile is worth it. I still remember Scholarly Markdown. I might genuinely one day implement some other transpiler so I can always do my last pass in LaTeX. As long as your thing emits some decent IR, I'm happy.