Not technically obsolete as they are still negotiable US currency. You would need 2 half cents though to spend lol.
Take it up with Capitol Plastic Holders, Not me. By the way "obsolete" in Webster dictionary means (1) to become unaccustomed, no longer in use (2) out-of-date HINT It usually pays to check things out first.
They are indeed obsolete, in that the US Mint is no longer able to issue that type of coin into circulation, same as an obsolete product no longer made by a manufacturer.