I think it is an interesting strategy to keep both coins.
When I received ETC i dumped them right away, because I did believe that one ecosystem would had to win over the other.
It is interesting to see that his has not happened and in fact two chains are existing in parallel, proving that my thoughts were wrong. At least in the short term. I believe what I forgot to include in my logic, was political will, which can keep many things illogical alive.
I am still not ready to buy ETC but am staying with ETH so far.