A true advance, revolutionary, would be "selecting away from," getting rid of cannabis cells needing to self-associate into organs/tissues/plants. Strip down the cannabis genome, revert it to be algae-like and grow as single cells. Then we could do relatively simple suspension cell culture/fermentation -- grow THC- and other terpene-excreting cells in liquid media likely using clear glass/plastic photosynthesis (bio)reactors with much the same lights. And presumably the cell lines would just do their thing right off -- no waiting months; harvest (filter the culture media, then purify) in days-a few weeks.
An analogy is the development of the human and other mammalian cell lines now commonly used for manufacturing of recombinant proteins, particularly biopharmaceuticals.