I bought an Ergodox EZ a few years ago. While I enjoyed it at first, I realized that I was avoiding certain workflows because it lacked arrow and function keys, forcing you to rely on different layers.
I like split keyboards, and I also like thumb clusters, but I’d really prefer something with dedicated arrow and function keys.
Update for future googlers:
I ended up buying the Kinesis Freestyle 2 with the extra wrist rests. It’s not mechanical but I couldn’t justify the extra cost for both an ergonomic and mechanical keyboard.


Believe it or not, MSFT made one of those back in the 90s. Terrible keys, but it may be what you wanted.
Edit: they apparently still do: https://www.microsoft.com/en-us/d/surface-ergonomic-keyboard/90pnc9ljwpx9?activetab=pivot%3Aoverviewtab
I owned one of those back in 2009. I liked it, though I can’t go back to rubber dome keys.
Agreed