After 20+ years of USMC active duty w/ 6 combat deployments (in addition to starting out as an 0331), I "try" to take care of my hearing as much as possible. Lots of damage already done, so just holding what I got.
My main reason for having a threaded barrel on my micro (smallest) 9mm's is for hosting a short suppressor to use as a nightstand HD option. The pistol can be wielded quicker and more instinctively to access the "bump in the night" for me, but I can always just past "Go" and grab my STF-12 pump if necessary and live to worry about my hearing later.
The smaller size of the micro/mini 9mm that is TFS offers me ease of maneuverability in the house while providing some level of hearing protection with an attached can. In my particular HD setup, I have different firearms for different uses in multiple areas. With each of them, I've trained and rehearsed to arm up and access the situation, utilize the pistol as required (w/ a "disciplined" light), and then fight atorfight to the area in the room or house (or property) with the next appropriate sized/ranged firearm as needed.
Some of my HD firearms are suppressed, some are not. Besides looking like a spy or assassin or just looking "cool" and having fun on the range, a suppressed micro/mini/sub-compact pistol works best for me pulling HD duties. Unless I want to carry it IWB and really impress the Ladies.
In addition to the Sig P938 Legion, I also tracked down a Sig P938 BRG w/ a TLR-6 that'll get it's own threaded barrel later this month. Seen here w/ a S.Co Omega 9K...
A very nice, compact silenced hammer-fired 9mm. I wish the Micro 9 had an available threaded barrel and I'm not sure about the Mako, but I feel this something Kimber should consider selling separately for cans and comps.