I think some of our members with "a few" fights under their belts while using suppressors cited better communication and obfuscation (for lack of a better word) as the primary reasons to run suppressed. Even a 20dB reduction is a big deal
Suppressor's don't make weapons silent, but they obscure the actual report of said weapon and make it sound different. Yes, of course quieter, but I can tell the difference between an M4, AK, .50, etc. When those weapons are suppressed, it's really hard to identify which weapon is being fired and it's a small thing, but my time spent going, "What the shit was that?" is enough time for an attacking force to exploit that advantage.was thinking more of a SOF specific use, not Infantry.
The main benefit to a suppressor is identification. A loud, clear report gives me distance, direction and which weapon is fired. A suppressor takes away that identification, at least for a time.
As for SOF vs. regular infantry- it's really useful in all circles, honestly, for the reasons outlined above.