Thanks for the links. It is good information.
I don't use selenium unless I want the color of the print to change. From what I have read, it doesn't protect unless the print is fully toned...and most of the time I don't like the hue given by selenium.
Also, I have seen plenty of very old prints that were likely not processed "archivally," and that were stored in terrible conditions (hot and/or musty S. CA garages and attics for 50+ years), and they have survived fine for the most part. I don't buy the "YOU MUST SELENIUM TONE OR YOUR PRINTS WILL FALL APART" viewpoint.