"Overproduction"? What does that actually mean?

It can't just mean production in vast numbers. If you can cope with production in vast numbers (e.g. Lexus or Toyota) then clearly that doesn't amount to "overproduction".

It must surely mean production in numbers which is greater than the manufacturer can cope with (i.e. the manufacturer can't maintain the appropriate level of quality).

So saying quality suffers when something is "overproduced" is simply tautologous. "Overproduction" by definition involves a fall in quality.

Long story short, more BS from our resident troll