What sells is the key. I’d buy a nice X-29 (actually I’d prefer a nice X-25), but as you note there is no market for a $500 brass X-29 when the choices you mention, and a Grabowski version, are “out there”
While I do not buy items outside of my period of interest - I cheer their availability - as they hopefully sell, and show potential manufactures there is a marketplace / there is a reason to invest in o scale (Yawns / negativity are not helpful in attracting new manufacturers)