[_russross]

I can't wait for the rest of the series:

Climate change is 99% solved. The last 1% is the hardest.

We are 99% of the way to ending all wars. The last 1% will be the hardest.

Scientists are 99% of the way to curing cancer. The last 1% will be the hardest.

etc.

[jeffbee]

"First 99% and the second 99%" is a common software industry quip.