There are a ton of reactive languages though ? QML is a mainstream one used in plenty of UIs and shipped as part of Qt (https://qmlonline.kde.org https://qmlonl

There are a ton of reactive languages though ? QML is a mainstream one used in plenty of UIs and shipped as part of Qt (https://qmlonline.kde.org https://qmlonline.kde.org), there's ReactiveML, Céu...