[OT] I'm throwing a few grains of salt in your common soup...(and yes it's off topic and is more about the comments above)
While my personal opinion leans towards Crispy's view (due to both my own intuition and my learning and reading so far) I don't reject the hypothesis that mappings between systems could be less trivial than a 1:1 matching (for instance MBTI and socionics function orders are incompatible, and there is the j/p switch...but I read people putting that switch in doubt, whereas for me it's obvious it should take place)
I'm also under the impression from reading old posts on this forum that the only few people that really knew (that is for me, people that just haven't read predigested conclusions of the main books (Jung,Augusta,Boukalov and al.) but instead actually read them entirely, and are really aware of what the current scientific consensus really is (or plural, when there are different debated conflicting views) ...Because yes I tend to discard all non-scientific opinions on that subject, there's no mysticism involved, either it holds solid ground or we're all wasting time in a giant online tea-party!)...so I think these people ultimately end up being tired of having to constantly argue and re-prove things that are established, against a tide of tireless newbies being way more lower on the theory understanding scale....and the knowledgeable ones end up leaving the boat.
I'm not talking about anyone here in particular, nor am I implying anyone in this particular thread is a newbie (if there must be one, it's me, I just joined) it's an on-purpose gross generalization of what I perceive, to make my point.
Also be sure that you'll read for any topic one thing and it's contrary. Above you can read there's no scientific proof of it being linked to anything neurobiological or developmental/genetic, in other posts (no need to look very far, just browse the article forum) you'll read there are clear links, including inborn traits.
For the sake of our souls and mental sanity, please, please, wouldn't it be possible to have a sticky thread as an entry point called "For those really interested in the theories themselves and their deeper understanding, it's where we are so far" - and this post would contain the current scientific consensus, saying what has been scientifically proved (and thus shouldn't even be put into question, unless to shake it a bit to see how strong it holds, as we need criticism too) Also it should clearly state: this point and this point are under active debate when it's the case. This point and this point should be taken with utter precautions because there's very little evidence. etc etc (and don't answer me that in this case everything is under debate and nothing is proved, otherwise stop it all already and quit, it's useless)
Don't misinterpret my views, I'm someone having a lot of faith and a part of me hate the coldness of the scientific approach, which kills any magic there could be out there and reduce it to formulas (if it isn't proved, it doesn't exist or is pure speculation, so no magic until further notice)
But what do you guys want? Do you want that people continue seeing this all as merely more useful than a computer generated daily horoscope, some kind of obscure, dodgy and sloppy art, making you look something between a shaman and an illuminated mad person? But maybe you do like it to be this way as it makes you more powerful versus those in ignorance?
I'm afraid that the scientific way is the only way we should follow, we're already on very ethereal and so abstract grounds by the very nature of the subject: the mind. Let's not complicate it more than it already is, as I'm under the impression that many people here like to challenge things just for the sake of "self-opinion right" (i.e "I value individual over the rest, we all have the right to have our own opinion, even if that implies discarding over 100 years of hard work by sociologists, psychologists and other scientists, who worked full time for entire lives on a subject I only read on the interwebz")
"Humble": Marked by meekness or modesty in behavior, attitude, or spirit; not arrogant or prideful.
We all should be, the things we're talking about are not trivial.