Apart from a few outliers most forks are air sprung these days, infinitely adjustable and even lighter than elastomers. I suspect the fairly rapid (in most cases) deterioration, possible inconsistencies in manufacturer and the fact that with air they don't have to manufacture anything at all, just add a couple of seals and a valve, lead to their demise.
Edit: I have several sets of Judys in use with full springs, full elastomers and type 2 spring/elastomer combos, they all work, are simple to work on and are relatively light, they're not the best forks in the world but are of their time. The worst thing is they can look immaculate from the outside but be completely fudged when you get them apart.
Yeh I realise most of the mainstream ones are air but many upgrade them with Push to a coil. You can’t beat a coil for feel and big hit.
They don’t upgrade them to a elastomer
I’ve 5 or 6 sets of SL’s and all have different combos of internals. None original though but by far the best is the spring converted ones for actually riding.