Kinesis Ergo Keyboard Advantage 2 Available
The original Advantage keyboard saved my career 25 years ago, so I feel obliged to tell everyone I know about them. :)
https://www.kinesis-ergo.com/products/#keyboards-section
https://www.kinesis-ergo.com/products/#keyboards-section
I think the main advantage is they replaced the horrible squishy row of function keys with mechanical keys. I'm sure there's a lot of internal/firmware changes or whatever too.