Dragon fruit can be grown in California, Florida, and Hawaii and is not "bland mush with tiny seeds that can require floss to dislodge". The author must have had a bad one. They can be extremely sweet. The seeds are so small that they go down without noticing and I've never had to use floss. My favorite is a variety with deep red flesh. Mangosteen is so far from its depiction---"to eat a pile of mangosteens is an exe…
I've been trying to find a good one in the states, so far no luck. I've only tried ones with the red flesh. The ones I had weren't bad, they were just flavorless. Not sweet at all. Kind of refreshing, but nothing special.