I agree with Ruckert. My 107 license has just expired, and I'm not convinced that my circumstances justify all of the effort and cost to retake another exam.
My Phantom paid for itself a couple of times over, and I have a new Mavic Pro replacing it, so I still look forward to some flying.
I've never flown higher than a couple hundred feet, mostly much lower, all within a couple hundred feet distance away. Do I really need to know a plethora of info in the test? I think not.
The Part 107 test covers so much material that has no bearing whatsoever on my own little flights. I can't think of a single thing in those test that has been useful or helpful. Way overkill, at least for me.
To be thrown into a category that seems to meet the knowledge needs of actual plane pilots strikes me as being silly. and obstructionist by people who early on decided they were fearful of the unknown.
I understand that it can be important to many others of you out there, but for me, I'd rather shut down and stop flying than go through another round of study and testing. Simply not worth it.