Yea I'm monitoring it. I was originally going to undermount the sink which would have given me a thicker edge but decided I didnt want to spend the time polishing it up and went with the drop in. I tested it after I cut and it held 180 lbs at the edge of the cut no problem. I'll reinforce - potentially with some steel flat bar.
Yeah, it looks like it'll give way over time. Maybe a 2x6 header front and back would suffice if not legs.