I saw you said in another comment that you recently already bought an ergo keyboard, but when you go to replace it check out some of the split ergos with integrated trackpads/trackballs that are starting to get more popular. I’m eventually going to switch over to a wireless split with a trackpad on both halves which seems like the best option.
for sure in future I will consider that. not having to take hands off the keyboard is a great idea and I sure will want to try it once my current devices will start to rot.