Final answer:
In-depth essays are not commonly used in essay appraisals due to their time-consuming nature, lack of effectiveness in assessing performance, and subjective nature.
Step-by-step explanation:
In-depth essays are not commonly used in essay appraisals for multiple reasons. Firstly, they are time-consuming to write and evaluate, which makes them impractical for large-scale assessments. Secondly, essays cannot effectively assess performance as they often lack timely feedback and fail to provide concrete evidence of skill mastery. Lastly, essays are subjective in nature, making them less objective for meaningful assessment.