SCWDS (UGA) records, dating back into the 1950s indicate that EHD epizootics run on a 9-yr cycle, with a 4-yr cycle superimposed on it. So... you can expect major outbreaks every 4-5 years.
I remember 2007 and 2012 being particularly bad here in KY. I retired from my job as pathologist at the vet diagnostic lab in 2018, so have not really kept up with subsequent outbreaks. EHD wreaked havoc on the captive cervid guys in '07 and '12... many of them had mortality rates exceeding 90%.
2007... there were dead deer everywhere... we'd had 1" of rain between May 10 and Nov 30. My daughters hated going outside the house because of the stench... at least 6 dead does that I found within 1/4 mile of the house. Had affected deer getting into folks in-ground swimming pools, in town. Despite what seemed like a high mortality rate, I can't see any long-term impact on populations. Have not seen or smelled any deads around here any time recently.
I still see upwards of 20, and often more than 50, in my hayfield, of an evening in the fall/winter.