Stop giving false information!!! There's no case where using ART has bricked one's ROM (if that's even possible!).
There's no risk bricking your device by enabling ART. Sure some apps might not work properly, but the majority will work ok. You can always try ART, see what you think and if you don't like the results, you can revert back to Dalvik. Keep in mind that if you have Xposed framework installed and you try to change your runtime to ART, you might end up with a bootloop. So make sure you have a backup, just in case.
But, I repeat, it isn't possible to brick your device by changing to ART.
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