Personally my typo rate has held pretty steady over the last decade, I don't think something like this would have any measurable effect on how well one types.

Personally my typo rate has held pretty steady over the last decade, I don't think something like this would have any measurable effect on how well one types. My concern would be that the extra keystroke to confirm would ingrain the skip confirm (fuck -y, or even just hitting enter before I'm prompted again) into my muscle memory, with potentially disastrous consequences (hence I've never installed this tool).