Comment by inigyou

It may be a different 2% every time. Eventually you can cover 100% of your users with 2% 50 times, and 100% of your users will feel your software only works 98% of the time. You can get a reputation as an unreliable vendor.

That can happen but it's usually not that extreme. But you should think about it. Negative reputation spreads faster than positive.

And if your software already supports something then all you have to do is not break it. That's usually easier than making it work then first time.