Not only in this country but world wide - cheap imports left many companies unable to compete.
Anyway I digress. Looking at the beads 40 or so years on. The different and variety does not compare to beads available (unless hand made) today. The majority are made of plastic in many different shapes either dyed or coated with a bright colourful enamel
Jewellery style is what you make it. Never one to follow fashion, just wear them on their own or with several layers of necklaces.
The ones that have been damaged can be taken apart and the beads salvaged for up cycling, as they are so different. The coating can peel off and careful storage is recommended in a well ventilated jewellery box. Not hung up which can weaken the thread of strung necklaces.
Matching earrings were also made for some of the Hong Kong necklaces. Some are still source able today.