Ah yeah, the terpenes in the strains do more than add flavour too. Different terpenes in different strains have been found to have different effects in combination with the cannabinoids in the strain. I doubt re-adding terpenes and flavouring after the fact has the same effect. I suppose I have tried CO2 extract, I have tried the prefilled oil carts with the added flavour. I don't like them. The high from them feels weird and the taste isn't great.