I have two TypeMatrix 2030s, a bog standard $5 101-key rubberdome for my wife, an ErgoDox EZ. I also have a keyboardio Model 01 pre-ordered.
Apart from these, I want to own a contoured keyboard at some point, and likely a split AND contoured too, so a Kinesis Advantage and a Dactyl may be in my future. At this time, I am not interested in any other keyboards. Non-ergonomic is useless to me, and on the ergonomic front, I am okay with what I have, will have, and the two future options.
Since I do not wish to sell any of these, even if they become obsolete, in the end, I plan to own exactly seven keyboards.