I'm not sure what you mean when you say that you have noticed writers using brackets. Writers have always used brackets when they're appropriate. Do you mean that you think people are using brackets instead of commas?
Note to Admin - when I hit "Reply with Quote" the OP's email address came up again even though you had removed it from post #1. I deleted it from the quote in my reply but there's either a glitch in the system or a basic fault.
Student or Learner