Good points. It is a very niche product that specialises in complex cutting on site or in very large surfaces. I can see it finding a home in a small workshop for inlays and the like, especially if they are into larger sheet material. If the end products are small then a dedicated CNC router, possibly wall mounted, is going to be a whole lot more versatile. Add a third axis to the CNC and it then becomes possible to do reliefs as well.Having looked into these in depth as part of a potential Venture investment in the company early on, I said no, because the use case seemed extremely esoteric. If you have any shop space a CNC makes much more sense from a capability and flexibility standpoint. The only use case that I could come up with that made sense was for highly custom on-site (i.e. job site) work and given the words "highly custom" and "big market" don't really co-exist in the same universe it didn't really make it a high growth potential product in my mind.
It is very cool... don't get me wrong, and given your clear desire to buy it and small shop space it might make sense for your use case, but I would go one step further and get in contact with people who are using it for what your use would be (or something close) and find out if it was an investment that paid off for them... 4k is a lot for something that can't even be used for an assembly table if it doesn't work out...
If there was any way to find space I would go the CNC route but would jump at the Shaper as the next best alternative.