In My first freelance project took me twice as long as estimated - How should I proceed? , it took the OP twice as long as he had estimated to finish a project (missing a few updated deadlines on the way, too). It was his first project. I commented only half-joking that that was really not a bad estimate for a first freelance project. I actually think that the comment contributed to the OP's question by putting it into perspective, and I stated that I was not being sarcastic, in order to avoid misunderstandings.
The comment got deleted with a reference to https://workplace.stackexchange.com/help/privileges/comment. That page has a few examples of what are good comments and what are bad ones, but my remark doesn't seem to fit either really well. Perhaps it could be seen as "minor or transient information", but clearly not in a technical sense (as a link to an article would be).
This incident inspired my request for comment here, for future reference: Are such general comments which are neither
- requests for clarification
- constructive criticism
- nor additional information
indeed unwanted? What's your current practice, and what would you like to see?