IMO, DRS has more than 98% accuracy. And that is the maximum we can expect. When was the last time, we heard someone complaining about any of the DRS decisions? I know about only 2-3 cases, out of thousands of matches. So it is very rare.
Agreed. I simply wanted to point out the fact that DRS isn't a perfect system just like similar systems in other sports despite its being very high as you mentioned.
Even too many objections and flaws in this DRS system but still this is the best for current cricket because we have no other suitable better option for this which replace this and give better results in difficult situations hopefully as technology is progressing we will have some better things in near future right now nothing is going to cover this all and ICC and their B-4 are also happy with this all, so it's going to be had safe future here in ODI and T20.
If someone is not happy with this then surely he needs to do invest big amount and try to have rooftop stadiums which can end this all, and we can watch games without any interruption which will be also good for all but not possible for all as it's going to be not reachable for all boards in the cricket world.