Yeah there is definitely something to the fact that adjusting reaches you back farther into time when trends were different, so to use meaningless nums (nominal) instead of meaningful ones (real) kind of proxies as a way to downweight older data in a way that’s actually desirable.
It’s kind of crude as a mechanism for doing so though, I have an aesthetic preference for taking adjusted cutoff and dealing with old movie skew explicitly. Which takes more time and I haven’t done yet(/ever) 😛