I had a 3 ft tall Artocarpus died on me this early February when we had an unusually one hot day in SoCAl; then a 5ft Soursop succumbed to a "mild" Winter last April. So, one died from heat, and the other died from cold...I guess I am not a good plant keeper...yet (- still learning -).
But, thank you LP for your kind encouragement, I think I would personally rather grow trees that are pretty commonly grown in my area, so I think I am not a good zone pusher candidate!
By the way, yes, I read those recent posts re. rambutan and durian....thanks again!
Regarding Tamarillo taste, I didn't taste this when I was there. (Our friend bought this fruit).
Edit: (added last sentence)