Why did they stop production of these boats?
For anyone from outside the parent company, any answer would be pure speculation.
Having said that, I personally own and use one of these exact model boats am and very pleased with how it functions on the water. Other owners have been less than pleased. One of the issues surrounding these boats was the lack of good quality control during production. The boats coming off the molds were quite often not consistent one to another in hull integrity.
The basic hull design of the Chuck Huff is good. Any hull coming off this mold, that has been built using the proper materials and building techniques, will be seaworthy and safe. If built improperly, any hull design will be questionable.