We’ve just started seeing the first ash succumb to the EAB in the last year, although we’ve seen them declining over the last two or three, so I’m sure the borer has been present that long.
I lost one, not coincidentally the one closest to where I stack the wood I drag home from others’ properties. I started treating my other ash with Safari (basil trunk spray) two years ago, so hopefully I don’t lose another one in the back yard. Now, with being at ground zero for spotted lantern fly, I need to make some decisions on how to treat my walnut, birch, and a other fruit and nut trees. Little is known about this new pest, but all indicators are it may be more devastating to a wider range of trees than EAB ever was.