We lost a bunch of ash out of a small playground park near my house (Kitchener). They did the injections for a few years, but it seemed even at the time like it

We lost a bunch of ash out of a small playground park near my house (Kitchener). They did the injections for a few years, but it seemed even at the time like it was more just putting off the inevitable. Or like, it was a way to do them in batches so we didn't lose all the shade in one fell swoop. In any case, the replacements have been a mix of slower-growing native species, so that's at least positive— in 10-20 years there will be shade over the park again, and hopefully it being more diverse will make it a bit more robust to new species-specific bugs.