We are on our second set of Yokohama tires and have been very pleased.
IMHO you experienced the fallacy of having tires inspected. Tires should be replaced every 5 years and in the Phoenix area every 4 years. A inspection can only catch inflation and wear issues not internal issues.
If you loose one the tires on a dual set up you should replace both tires since the tire the did stay inflated has been subjected to a huge overload.
Again this is IMHO
Be prepared to be told that someone has tires that are much older and they are fine because they have been covered and treated with some magic elixir.