Your dicks will work fine for awhile, until the anti androgenic effects pile on over a prolonged period. Further, deca dick lasts clear into pct, and even beyond for some guys, because progesterone may not normalize with endogenous testosterone. Plenty of guys (even on tren) will have seemingly normal blood work (at least according to a less expansive panel), while not being able to get an erection. To compound the situation, nandrolone metabolites are detectable up to a year after use, and may actually interact with progesterone and estrogen receptors for a very long time after you cycle off.
I always have to laugh at the idea that once you're suppressed you're simply suppressed, as the literature is quite clear, each compound is individually suppressive in a dose dependent manner. The idea is simply justification for less than ideal cycling protocols. Suppressing the HPTA isn't as simple as recovering the testes back to full size and production, as you can see from the way nandrolone impacts other hormones in the body. But even when limiting the concept of suppression to testicular function, you'll certainly see different levels of suppression and varying levels of time required to get back to physiological normalcy.
SARMs illustrate this concept quite effectively, since the average person could run 5 mg a day of something like ostarine (possibly indefinitely) without any suppression, or 15-25 mg a day while running clomid in tandem and end their cycle with more total T than they started with.
Is there merit to the idea that once you've essentially shrunk your balls into non-functionality it doesn't matter which compounds or dosages you've utilized? To an extent, but the time required to get the HPTA back to physiological normalcy can certainly vary depending on the cycle that shut you down. Ask the guys who blast only tren for their first cycle, and have severe low T side effects 6-8 months after ending the cycle, even with "normal" blood work.
You see threads on here all the time where these guys are asking for help. But yes, all AAS (and SARMs) are individually suppressive in a dose dependent manner.