Rum
The other factor is time, in the light of time I think corrosion might possibly be more of an issue for weekend warriors like myself. Tentative hypothesis would be something along the lines of:

1. sharpen your tool
2. do [small project] which isn't enough to warrant resharpening
3. let sit for [time of duration of life events say O(2-4 weeks)]
4. corrosion sets in
5. subsequent usage is less than stellar.
6. possible repeat the previous 4 steps

   I'm thankfully in a super dry climate so background corrosion is relatively low so it hasn't been a huge problem for me, but I also try to clean/wax when done for the day (usually...) so that likely helps.

   This would be more than slightly more tedious to test than the current ongoing set