It would be sad just by the fact that another choice in manufacturer is taken away. I just recently got a Sigma 28-300 super zoom, after putting it aside for a while, who uses a super zoom! I was surprised to say the least at the quality i got from that lens and before all of the purist go of, i know that primes are better in quality but much heavier to carry.
BTW the sigma was stuck on a canon eos1n.