If you didn't like 'washing line' cables ruining your night vision, why did you carry on riding with them then (or choosing that bike to ride in the dark)?
Thank you for complementing my favourite chest of drawers: it was made by my father.
and I love how irrelevant to the thread it is.
I like to be able to see equally well at night on both short and long rides . .
Well you're saying what you think is a disadvantage of STI side entering gear cables; and I'm disagreeing, indicating where I'm drawing my experience from (add evening riding to a distant pub weekly through the year). Presumably the OP has a motive for the question and that's worth chatting about, no?
CycleChat threads are sometimes like that: divert off specific topic (hide cables under bartape) to share riders' opinions and anecdata eg: the reasons (other than style and tidiness) for under-tape cable runs, and the penalty (some concealed cable run STIs are unreasonably prone to cause the cable to fatigue, fray and part, leaving a knobbed end which is a b****r to get out, sometimes).
Getting in the way of a bar bag is the main drawback for me (and you pointed that out), but one I'll put up with (and do without).
An aero-drag penalty is the other main one. But riders concerned with that are unlikely to be riding 8/9 speed bikes.