EXPOSURE is a personal decision, one that I encourage in almost all situations, here's why:
1) As thrive in secrecy, EXPOSURE typically replaces the "magic, excitement and romanticism" with pure ugliness, shame and embarrassment, damaged reputation and integrity, plus other type of consequences in cases of workplace As. Because of those consequences it typically decreases the chances of a repeat, cheaters fear exposure. After Dday and for a long time the BS loses complete trust and doesn't really know if the A has ended and/or could resume at some point (or with a different or more than one AP), the first step towards a successful R is to END the A(s), nothing kills an A faster than EXPOSURE (and D papers served).
2) When cheaters have to face the sheer embarrassment of an A, it typically helps with regret and remorse, therefore chances of a successful R increases, if the R attempt fails and results in D, at least the cheater has a more difficult time blaming the BS and controlling the narrative.
3) When asked by other people "what's wrong" "is everything OK?" you don't have to lie (even by omission) for many, it is a relief not to have to protect the WS for the huge betrayal.
4) EXPOSURE makes support by loving ones possible, it could be a life saver, lack of support can even lead to a deep depression and even suicide among other things, if you have the support of loved ones, it typically helps.
5) If honesty and integrity are important to the BS, exposure helps with making the BS not feel like an accomplice to hide the A. Exposure was always a risk that the WS took and kept taking during the A and they decided to go ahead with the huge betrayal anyway.
These things come to mind but there are so many others, I agree it doesn't have to be "scorched earth" but I always suggest to expose to at least OBS, family and close friends (in that order and without warning) that the BS feel can have an impact in the situation even if it's by just knowing the truth.
Again I agree is a personal decision and in cases where the WS confesses (by far the minority of cases) the exposure should only be limited to stakeholders but I think and based on THOUSANDS stories here and other forums, the benefit of EXPOSURE outweighs keeping the A a secret, we all know As thrive in secrecy so why keep the fertile ground for it to continue and/or happen again in the future? you don't want to be exposed for cheating ? the simple answer is that all you have to do is remain faithful and not cheat.