They can’t erase memories. And those memories will last for at least a generation. Richmond, Minneapolis, Chicago are in the same jam.
I concur that the memories will last a generation but the chaos and damage occurred in the area of a few square blocks; Portland and suburbs are quite large geographically. For most everyone outside downtown, covid restrictions are a bigger issue than the riots.
You mention Richmond, Minneapolis...but I think Portland and Seattle had the worst of the riots, or the worst of the press. When I think of the riots that’s what the think of. And NYC.
Don’t forget New York. It will never be the same.
Some cities never recovered from the 1960s riots—six decades later.