You lose most of your terpenes in order to clean your oil. Having a 84% thc/cbd winterized shatter needs to be given flavor and direction that is only moderated through the synergistic effect between thc/cbd and terpenes.
I agree entirely, its done in many top quality companies either through fractional distillation or natural sources (i .e. Orange peel extract) these are natural terpenes found in cannabis and certain fruits) they are of proven therapeutic and medicinal value.
Ive done a test 83.4 % toral cannibidoil no butane was detacted but some ethanol was, a slight wip after scrape from winterization will clear the rest out