For someone paranoid about correctness, that's 1% of lingering doubt about every single operation in the IDE. The 99% stat is quite likely a big exaggeration.

For someone paranoid about correctness, that's 1% of lingering doubt about every single operation in the IDE. The 99% stat is quite likely a big exaggeration. Refactoring is far far harder to do reliably, and more straining as so much more responsibility on the programmer.