So someone who has the rules of commas down pretty well and seldom makes a mistake in this regard, I did not see any of your 16 errors. Maybe if I was looking harder, I could find them. But your piece communicated well with or without these errors.

For those ultra grammarians who can justify no further reading the split second they see an error, well, they will be missing out some wonderful opportunities in life. Imagine all the international business deals that would go bad if a misplaced comma were to cancel that deal.

We also have to assess the expense of a proofreader over the fact that most Medium articles will not get great readership. For that reason, I am forgiving of a few errors.