I've worked in multiple jobs where some piece of software was an incredibly complex ball of mud, where things were left without refactoring because no-one currently in the company understands how they work, and no-one can spare the time to do the refactor properly. Where changing a method or property unexpectedly breaks some other, apparently unrelated feature. Needless to say, this made adding new features a pretty risky affair.
This happens all too frequently to believe in your 99% statistic. For example, it happens with some pieces of software at my current job.
It happens all to frequently because the 1% tends to be very long lived. If 99% of babies died in the first year of life, all of your friends would still be more than one year old.
I've worked in multiple jobs where some piece of software was an incredibly complex ball of mud, where things were left without refactoring because no-one currently in the company understands how they work, and no-one can spare the time to do the refactor properly. Where changing a method or property unexpectedly breaks some other, apparently unrelated feature. Needless to say, this made adding new features a pretty risky affair.
This happens all too frequently to believe in your 99% statistic. For example, it happens with some pieces of software at my current job.