But, at the very least, there wouldn't be any plot holes that couldn't be filled with a couple of epilogues. I think that's really what defines an ending for me, and how I look back on a series.
There are eight books in total focused on individual couples, though other epilogues and anthologies as well. I would not be shocked if in the end, Netflix adapted all of them.
I will write relatively short . . . epilogues bringing each case up to date—this is bound to add a rather tragic element . . . because in many cases the superb effects of the drug were not ...