It's never going to be the same, unfortunately. I do wish I had started caring about my ergonomics before I got hurt again though. I was a huge fool to think that a "good looking" keyboard was more important than a keyboard that was built for human usage for so many years.

Also, don't skateboard folks. At 15 I got some sick permanent titanium parts from the first broken arm, and then at 37 I broke the same arm doing the same crap and it sucked. 6+ months later and it still hurts and I will never regain the same range of motion.

Also, to answer the root question: The keywells and contoured design are 1000000000% worth $200.

Nope, but I had several coworkers that swore by Advantage2s. I broke my left arm for the second time in my life last year and one of them implored me to try their extra Advantage2 so they lent me one, and I haven't had wrist or shoulder pain since. I bought my 360 before I could even touch type on that borrowed Advantage2.

FWIW I love my Kinesis Advantage 360 Pro. I did initially have connectivity problems but it's been solid since. There's also a beta 3.0 firmware which I am now running that is much, much more stable. The configuration is the same for any ZMK board, so I didn't have issues since I have been using ZMK for a while on other boards. It has a learning curve but it's relatively simple and for basic remapping the GUI works well.