Plenty of reference and preference for INTJ around here. Some think INTJ is a bettered INTP.
If its a one-letter-difference thing then why not so much love for ENTP, ISTP, INFP?
Is it a J appeal (P perceived as causing most problems in its combination with other traits)?
Is it that INTJ's considered to be "the Mastermind" and thus 'ultimate' type?
A combination?
By Socionics, compatibility for the two is 18%, and labeled as Quasi-identical.
There is high resemblance - but what does it mean?
Our society has evolved to be heavily dependent on mass-produced homogeneous technology. Even in those areas we rely on people, such as work, we still rely on technology such as computers to double-check their work, and to get round any other problems we might have with dealing with people. So our society is heavily dependent on those who use T a lot.
We're also a highly integrated society, with mobiles, email, and the internet. If one person has found a solution, it's on the internet by the end of the day. So where we do have a problem that we don't already have a solution to, it's one where group-think has failed, and so would require solutions that extroverts have already failed, and it's up to the introverts to save the day.
For the same reason, if existing reliable solutions exist, the types that Sensors suggest, they've already been posted on the internet, and everyone knows about it. Again, up to the intuitives to solve what is still a problem.
We've also used technology to provide goods, services and solutions as quickly as possible. As a result, people have become habituated to expect instant answers. INTJs prefer to provide instant answers.
INTPs prefer to give a more accurate solution, that future-proofs for any future potential problems, and that takes time. It's more efficient, when it comes to policies that will be enforced for a long time. But it doesn't address our societal values of getting everything NOW.
So, INTPs and INTJs both seem to be the people that most people will turn to, for the problems in their life that they haven't already solved themselves, to solve them via technology with new and ingenious solutions. But INTPs take a long time to get to them, and that infuriates people, because they are so used to getting things NOW. INTJs promise to solve solutions NOW, by relying on improvised methods using Ni, with the expectation that if there are problems later, which they always are, they'll solve them again with Ni. That might be a problem. But usually, people are so used to having solutions already, that their impatience overrides their need for caution. So INTJs appear to be the saviours of society, and INTPs those who could save society but don't seem willing to.
In the Medieval era, when society had not been sanitised, and people were very much aware of how many potential lethal threats there were around every corner, a new solution could bring with it a lethal threat. So then, the xNTP approach was preferred to solve such problems. INTJs were probably often employed as skilled craftsmen, finding ways to make solutions and improvements to keep the machinery of society running.
In reality, INTJs are much better at giving temporary immediate workarounds to technological and practical problems that no-one has any reliable solutions for, not in documented records, and not any solutions discovered by other people. INTPs are better at taking the time to work out solutions for long-term policy, that would be as problem-free as possible from future problems, and so would be as reliable for the long-term, as possible.