It's pretty popular to replace ones optical drive* on the MacBook Pro with a HDD, but how serious are the risks?
*In most cases, you'd do this when installing a third-party SSD, but I'd like to leave any of those benefits out of this and isolate matters of the HDD and Superdrive.
I mean things like:
- Performance issues
- Battery life
- Warranty status
- Weight increase
- Upsetting Steve
Update: The above questions have been addressed in this question, but there is a more serious issue — potentially, a missing sudden motion shock sensor in the optical drive.