Programming language development has essentially ceased, no? Because now that you have a super powerful, ceaseless special interest personality that can be ordered to be specially interested in any problem. The actual problem - a dearth of things that special interest personalities will do for little to no money - has been solved.
it's not really about traction or adoption so much as it is, the average developer values an ecosystem of free shit to use to make money.
the slow part is, the decades-long pipeline that converts the finite number of specially interested people created every year into programmers who sit around and do stuff for giant corporations, practically speaking, for free. maybe that is way too cynical but am i wrong? LLMs have had a range of programming performances, but for the whole time they have existed, they have not had difficult personalities. which is far, far more valuable. the majority of people in the white collar workforce are there because they are, #1, pleasant to work with, not good at their jobs. and look, specially interested people, who will pay huge amounts of money in order to avoid contact with people, agree!