It's really wild. I wonder what trees we'll have left!

Besides the famous case of the chestnut:

Dogwoods are being wiped out, mostly gone in some areas, disease originating from Asia: https://henderson.ces.ncsu.edu/2021/03/native-dogwoods-long-...

Sassafras trees wiped out by Asian beetle causing laurel wilt: https://www.lsuagcenter.com/articles/page1685633928383

American elms largely wiped out by Dutch elm disease (also actually originates from Asia) https://www.invasivespeciesinfo.gov/terrestrial/pathogens-an...

Others in this thread have talked about the threats to ash. It's very disheartening, but I guess it's the inevitable price of globalization.