I have 6 shafts for my old block letter Joss.
2 of them are Stroud shafts and are compression fit. Very nice. Perhaps it demonstrates how accurately the original stainless joint collar and pin were installed.
The other shafts are 2 Joss, and 2 Scruggs. Very nice, but not compression fit.
It seems the makers that were commonly using stainless are still doing it. Some have retired like Stroud and Mottey, they commonly used it. And then there are some other big name custom makers who seem to still do it as a standard. Granted it seems to be the older makers. AFAIK it is still pretty much still a standard joint for Barry. Of course his dad did a lot of them. Tasc still offers it as the standard joint. I believe Frey still does it. Dayton too. I think it is still standard for Russ Espiritu.
Among the "production" cues...Joss and Schon still do stainless mainly.
You see a stainless collar on a lot of McDermott's highest end cues even still. Cues that sell for thousands.
Viking still offers the stainless collar.
For imports, Adam does a ton of them, especially in their traditional designs.
Certainly the big pin into wood has gained a lot of popularity, but the traditional 5/16x14 piloted stainless seems to be holding it's own, along with variations using the stainless collar.
It is "old". Many of those custom makers that used it as a standard did the ivory joint as an upgrade.
It seems classic to me, and still strongly represented.
If it was good enough for George and Gus, and Joss and Schon are still doing it, it seems to be holding its own for the time being.
It hasn't gone out of style, it is simply less popular. But IMHO still a major player when I can cite so many custom and production makers still using it, and some still primarily using it as a standard.
I am not a cue maker though, so perhaps the gentlemen that make the cues have better insight.
.