I, too, would be concerned about the "digital press" type processes. I worked in this industry for a little bit in the mid-1990's and the quality was good then for traditional printing work, although it was much more expensive. It certainly wasn't photo quality at that time but in the intervening years I would imagine they should be almost there. For B/W, even in the 1990's the quality could match traditional press, but the cost could not.
Hopefully, in the future when these devices have gone mainstream, units will be available for the serious consumer. Maybe not cheap, but something we could buy. However, I would still prefer to print in the darkroom because I am tired of being digitized with everything.
I think RA-4 paper will be around for quite some time. However, the stuff will eventually go away. Kodak will probably be the last producer, or maybe Film Ferrania if they ever get their act together. Ferrania made decent paper back in the day.
Personally, I am much more concerned about the continued availability of darkroom quantities of CD-3 and CD-4.