Excellent article.
I'm aware of the difficulties. My post was an attempt to answer the question without going into a book long explanation of all the ins and outs of it.
First of all, science will always follow the evidence, so you can EXPECT opinions to change as new evidence is found.
Second, real life is messy. It doesn't want to fit into categories. As humans, we label everything--that is what language is. But how do you label things that exist on a spectrum? Usually we divide the spectrum up into pieces and then label the pieces, but where we divide it is usually ARBITRARY.
For example, we divide up and label the visible light spectrum. In my country red and orange and yellow are three separate colors. But in other cultures they share the same label.
I could say a hundred times, real life is messy. You have lions and tigers that as a whole do not mate together. But every once in a blue moon they will, and a liger is produced. Now, to make it more difficult, if the liger is female, she is fertile and can produce offspring. But if the liger is male, it is sterile. Oy vey!!!!
So does that means lions and tigers are still the same species? Or have they successfully separated?
See the problem arises in that the question of whether two animals are the same species exists on that troublesome SPECTRUM. It is not a case of yes or no. It is a case of: To what degree are lions and tigers still the same species, and to what degree have they become independent.
Messy messy messy!