Interesting topic.
I'm also in the neutral zone for the .40.
In fact, you could say I carried one as a duty piece for ~10 years - except it wasn't a .40 - it was the S&W M1076 10mm always loaded with the '10 LITE' (180 gr JHP at 950 fps)
Ballistically, a twin to the later-developed .40.

In several OIS's, it did fine.
Our department left that platform due to the discontinuation of the M1076 as well as the high ammo cost (remember, it's always about the $$)
I was happy they replaced it with the M4566 and CS45, as I'd always been a .45 fan, often carrying some form of M1911 off-duty, against regs.

After I retired (2008), they went to the M&P .45 FS.

This year, replaced that with the Sig P320 9mm.
I'm sure they got a sweet deal from Sig and the 9mm is far less costly to train and qualify with. And for people that are not interested/involved shooters - the 9mm will always win out on cost vs. results.

Will probably never own a .40. Still have my M1076 and a Colt Delta Elite 10mm and a large supply of '10 LITE' ammo, as well as a lifetime supply of brass that I can load to 'real' 10mm performance levels.

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Ret'd LEO
SWCA #2275