[Faster]

SailandOar makes some excellent points on this score, but for me the issue also comes down to aesthetics. Few boats "look" good with outboards on the transoms.

Fewer still have been produced with inboard wells that work. You either get fumes/noise in the cockpit, or difficult access, and/or cumbersome well closures and mechanisms for retracting the motor for sailing conditions.

The single plus for a transom outboard installation in my opinion is the greatly enhanced maneuverability during close quarters docking (assuming the motor/throttle/steering is easily accessible from the helm position - also not a universal truth). After that the ability to take it home to fix it is next.

As many boats age, especially those that originally came with the old OMC saildrives (essentially outboards permanently stuck through the hull), it is becoming increasingly common to see the "inboards" forsaken and replaced by bolt-on transom mounted outboards. From a cost point of view this is an understandable option but creates a vessel suffering from SailandOar's negatives, and losing that cleanliness of lines at the same time.