I received a 575 foot roll of Kodak Supra and 100-8x10" packs of Kodak Endura and Fuji Crystal Archive II last week. I don't think RA-4 paper is going to run out soon. Why worry about whether it will be around in 10 years, you can print it today!
Two workflows? Enlarger, adjust dichroic head mixing box for contrast (B&W) or color balance (RA-4), expose paper, develop, stop, fix (OK, blix), wash, dry... what is the difference in workflow to which you refer???
I used to love slides but no one wants to see a slide show anymore sadly so it is prints for me now.