It's common.
Also depends on what the recovery process looks like.
Just quitting drinking / left to your own devices = sitting duck for depression.
Quitting with a support group = less likely
12 step recovery program = far less likely again.
It's kind of like a car restoration.
Bit of new paint - just a slightly dressed up old car.
Full engine overhaul - mostly still an old car, but should run a lot better.
Full strip down rebuild of Everything = all but a brand new car.
So anyone in recovery gets the results they put in.
What's your man doing ?