The author discusses the drawbacks of using errors as values, particularly when it comes to losing call stack information.
Stack traces provide a detailed sequence of calls that lead to an error, but they have limitations in scenarios involving asynchronous functions or threading.
To address this issue, the author attempted to add call stack information using the 'StackTrace.current' method, although it was not deemed critical at the time.
The author also mentions a code snippet for generating comment summaries, revealing the line number as 375.