Maybe relatively successful. It is not that Dogecoin is globally accepted and adopted by the majority of people.
You aren't probably happy with the adoption that Dogecoin is reaching. It's one of the most favorite coin of majority and though it's also one of the funniest coin, still the popularity of it increases. Bitcoin is the globally accepted and adopted by majority but look on how many exchanges dogecoin can be traded. I can consider that as a success for a coin to be listed almost everywhere and when you ask an altcoiner, he's probably aware of what dogecoin is and he probably has.