But we are trying it, and opinions (internal to my company) are varied. Some people like it, but I don't. Because (a) it has missing functionality here and there (b) it still has a long road to go to become battle-hardened (c) I don't see any of the current supporters having deep enough pockets to fix (a) and (b)
So we're taking a mostly wait-and-see attitude.
But we have an existing deep and wide investment in Swing in our products, so our risk profile is probably somewhat different to yours.
As far as I'm aware, it was only pulled from the JVM into a separate dependency, as did several other components, in order to keep the JVM slim. Are you saying development on it stopped altogether?
There are however, a couple of small companies, and some individuals using it, and providing contributions.
Gluon also provides builds for LTS and latest here: https://gluonhq.com/products/javafx/