Yep, bigger engines are more efficient at producing thrust to lift the plane with less strain which produces noise. It really is remarkable the progress in engine technology over the last 20 years.
No need to be nervous my friend. I've flown on the Max many times now, including all four US operators first flights post-grounding. It's a good aircraft, and once you fly it, you'll see it's just like any other flight. Maybe just a bit quieter haha.
Thanks man. I did hear that, but it doesn't mean much to me. I rarely check a bag. I once took a two week trip to Hawaii and California with my backpack and a carry on.