Over the last three years I closed eight cards and dropped about $90K in credit limits. There was a very minor reduction in my credit scores which came back quickly. Got tired of trying to keep so many credit cards busy when I did not really have the spend and was using some of them when I did not have a real need (store cards particularily) to spend. Also, Citi Bank and US Bank said I had too much available credit for my income so I took the guidance and worked at right sizing my credit profile. Considering the closure of some more bank cards as the spend just isn't there and I don't want to manufacture spending to spend. My attitude today is, if the money isn't in the bank I don't spend. 
@Anonymous wrote:
I just read a thread about cards being auto closed due to inactivity. I have two cards (both synchrony home) that I do not plan on using in the near future and they’ll probably close before I need to use them anyways .
An app I use has a credit score simulator and if I tell it that I’m closing either cards, it projects at least a 10 point boost in my score. How accurate are these simulators? As I said, I won’t need these cards before they’ll close anyways, but I don’t want to negatively hurt my score now if I can help it.
1. The simulator is entirely unreliable.
2. It is unlikely that closing the cards will make any difference in your score either way, unless losing the limits significantly affects your (a) utilization percentages or (b) percentage of accounts reporting a balance.
Closing credit cards is not a credit decision: closing one will never help one's credit scores (talking FICO), on the flipside it won't hurt either except for utilization metric changes and that can be managed other ways.
If you decide to close them, can just dump them all at once: it doesn't matter and actually I'd suggest it'd look better on the credit report anyway.
