I've seen conflicting answers on other websites about whether or not it is grammatically correct to add a comma after the word "Sometimes" in examples such as:
Sometimes, we are unable to provide assistance.
Is the comma in the above sentence correct?
I looked at this post on Quora. Answers range between commas being for readability to being used to distinguish emphasis. I looked at questions on this site discussing when it is appropriate to use commas, but they did not answer this question. To clarify my question, would the quoted sentence have the same meaning and be grammatically correct regardless of the comma?