A friend of mine is from Carbondale, Illinois - Fuller's home town. From what I understand it's a deadbeat midwestern hellhole now. He once told me a story about breaking into Buckminster Fuller's now-abandoned dome house and smoking weed in there.
The upsides of a hexayurt are many. Done well, they're possibly the best housing on playa - definitely competitive with RVs, if you bring your own AC. Mine's lasted five years, and all I've had to do was replace the door panel (a door to the floor - resulting in a U shaped panel - is not the best plan).
But! These are, in my experience, the hard parts and downsides - not that they're insurmountable, or even all that difficult, but worth mentioning:
1) Doors are hard. No, really.
2) Storage & Transportation. (8ft by 4ft+ by 8in+)
3) Can't lean on the walls
4) Short doors get annoying, fast.
Anecdotally, I'm definitely seeing more hexayurts out there each year, particularly the small stretch designs (which are fantastic, btdubs)
tl;dr: the dream is over