Kinesis Advantage360 Ergonomic Keyboard
kinesis-ergo.com
Split-adjustable, contoured design that maximizes comfort and boosts productivity. Mechanical switches, onboard programmability and more. Available Bluetooth and ZMK open-source firmware.

I guess for me the biggest difference compared to a Charybdis is that it’s a professional product.

I love the Charybdis as a project, but due to the price, I would rather go for something that can resist the test of time.