My credit union cancelled my debit card due to the long ago breach at Target.
And they cancelled the replacement debit card that they sent to me last week, which I hadn't even used yet, due to the breach at Home Depot. 
After two breaches do you really want to use your debit card again?
Well, I could use a credit card instead, but the same thing would happen. I just don't carry much cash on me and there is no way I am going back to writing checks at the store.
I still don't know why, and they couldn't explain it to me, they cancelled the unused debit card. In addition to never having been used, I never shop at the store that had the breach.