I'll pop in for my 2 cents!
I play both upright and electric, but I started on electric. For a while, I always thought my electric sounded better than my upright. I groaned whenever I needed to bring it because it would require a lot of extra effort for a sound that I didn't prefer.
Definitely not the case anymore!
I have been a double bass performance major for 2 years now, and I have since refined the snot out of my upright technique. I now can say that, for straightahead jazz, I choose to play my upright in a heartbeat. Maybe it's a mindset thing...I swing so. much. harder on my upright. Swing feels so much more natural on the upright, I don't really know how to describe it. Other musicians get excited when I bring my upright.
Now, granted, some of the things you said in your article are true. The electric can be much more of a lyrical instrument because a) it is easier to play adeptly in the upper registers, and b) it projects better in the upper register because it has so much more sustain. (want sustain in your upright solos? Use a bow

). But yeah, you're not gonna get Pastorius solos from the upper register of your upright...you could try though. My bass teacher actually did an arco version of Donna Lee as part of his undergrad senior recital.
Another observation I've found is that the upright sounds more natural, while the electric sounds more synthetic. Maybe that seems obvious, but it's a very important distinction to make. Electric also gives things a more modern edge, which in many cases might be what is called for. It all really depends on the situation, who the players are, what the tunes are, etc. It sucks, but sometimes I bring both to a gig!