I suspect it has much to do with people being slow to accept big changes in some systems.

Boeing (and surely other airplane manufacturers) has investigated and considered lifting body designs - https://en.wikipedia.org/wiki/Blended_wing_body - but chose to move forward with traditional designs. I don't see the news item now, but I read that Boeing felt it was just too radical for passengers to accept (despite the significant advantages).

It will probably take some wealthy "renegade" type to start a new airplane company that offers new designs like this.

Unproven technology and the market for "personal airplanes" is relative limited so not that much funding available.

Still, I love clever and intelligent engineering like this and I hope there's a future for something like this.

Because it looks weird. Seriously. There is a long list of excellent aircraft like the Long EZ and the Facetmobile that never took off because, at the end of the day, people are willing to pay extra to have something that looks like an airplane.