haha look at Walter with any of his mangoes. One year, it's the best mango known to man and beast; the next it's top-worked with a different cultivar. I think the only trees in his grove that hazn't been top-worked in a few decades are the keitts that are probably the $$ makers.
I think it's part of modern culture to get bored with things and long for 'new.' Applies to cars, cell phones, music, hair styles, clothing, TVs, etc (sometimes even spouses!). Things go out of style pretty quickly these days.
Yanking the citrus and heliconia was a smart move... :-)