...
Thinking outloud I was wonderfing if at some point I might have to fit a rear disc to my MK2 Nomad CSS rear rim. Logic would suggest that if CSS rims become unavailable then CSS brake blocks will too, perhaps with a bit of a time lag allowing for stocks to reduce.
I think the logic is that after you have worn out one set of CSS brake pads, that your rims are smooth enough that you can then safely run different pads.
When I bought my CSS rims a decade ago, SJS did not have the blue pads in stock, only the Koolstop CSS pads. I think I have one set of Koolstop pads on the shelf so I can change pads on one wheel which is my plan.
My other wheel would get normal pads. Not sure which wheel would get a second set of CSS pads and which would get normal pads, but that is a few years away so not going to think about that now.
If that does not work out or becomes a problem, then I would probably put on different rims, since I have wished I had wider rims on my Nomad Mk II.