Well, someone was questioning the operational need for reverse thrust in early posts.
No need if you have long runways with no contamination, but try to do that in limited runway in winter condition.
There is a rumor that an operator in Northern Europe had to shut down the 145's engines on icy runway in order to avoid running out of the runway, at least few times during last winter...
So, the available runway was long enough according to calculation, but the braking action was not exactly sufficient.
I'd say reverser would have been handy...
I guess they come as an option, a bit of money required though...