the 1980s want their thread back…
Seriously, this was all the rage (or folk were all up in arms about it) in the 80s, not sure it’s still common practice although it is permitted additive I believe (@teacake ?)
I’m not sure how prevalent it is these days with the plethora of single malts which wasn’t really the case in the early 80s. That – and other independent bottlers) have celebrated diversity and possibly educated drinkers such that they don’t pass on a dram because it doesn’t look the right colour (or are attracted to a dram because it’s darker and therefor must be easier and older).
So, true but possibly not as much as was the case 20-30 years ago.