Since most colleges, notably many Ivy League and other top schools, stopped requiring the SAT Essay portion of the exam, would it still be in my best interest to take the essay portion?
For schools where it is not required, then it is not required. You do not get bonus points for taking it with the essay, so it comes down to your choice. Obviously if any of your target colleges require the essay, then the question is moot. For the rest, they will spend more time analyzing your application essays than analyzing your SAT essay score. Good luck.
I would take it if it’s recommended, or is the school says they will consider it if it’s submitted. Otherwaie, I see no reason to take it. I suspect it’s going to disappear from the test in the next couple of years.
If you’re a good writer and think this is an opportunity to showcase that skill, then I see no reason not to take it.