Did NAD’s quality control drop off during a specific manufacturing run?

I sometimes wish my NAD 3020 BEE would die so I can replace it. But those precarious circuits are still going strong after 22 years. It was also my experience with a previous NAD amp (gifted to a mate) as well.

I only have a few doubts that it’ll outlast me (only 20 to 30 years to go).