I'm not worried as I'm pretty happy with the results I have. I've always known I was deaf and had nothing to lose, as I'd lost most of my hearing, so it's not like the CI really changed anything.
If you are always waiting for something better in life, you'll be waiting forever, afraid to grasp anything out of fear that you might miss something later on.
Well put R2D2.
Another thing to consider is that whatever the technology,HA, CI, ANI or Haircell regeneration , the brain still has to adapt to it. The brain might not adapt as well 5 to 10 years down the road after being deprived of sound for so long.