Metric System Why or Why Not?

I don't think that the U.S should switch over to the metric system. By changing our systems everybody will be confused because they were all used to using inches, feet, etc. Also, companies that create items that display inches will now be useless since nobody would use it anymore. Those companies would have to throw away all their products or they'd have to recycle them. This will cause everyone to throw away their rulers and measuring items that are not from the metric system.