Mine had it on since purchase.
I just turned it off and prefer it off. It seemed to fight things when set to autovelocity- which is exactly the opposite of that settings intent.
If you didn't hit it hard, it sounded great- but the minute it started working a bit- it sounded bad to my ears.
That was what motivated me to open it and see (as I bought it 2nd hand).
Its a fussy comp, in general, but I paid 1300 bucks and its worth every penny!
I still absolutely LOVE the limiter- brick walls brilliantly.
If you pay 5K for a Neve 1073 you are a fool...