I think the reason is that many of the problems JQuery was designed to solve (DOM manipulation, cross-browser compatibility issues, AJAX, cool effects) have now been implemented as standards, either in Javascript or CSS and many developers consider the 55k minified download not worth it.
Much of the discussion here revolves around whether or not the artist deserves credit for creating a work if it was fabricated by other people, which I think somewhat misses the point.
The issue, I think, lies in the lack of shared credit that's granted in the art world to people whose labor and skills are utilized to realize the work.
Across most of the arts, the work of many artisans, craftspeople, technicians and workers is poured into the realization of an artwork, and across most of the arts those people receive some sort of credit. The film industry is maybe the best example here. In "cinema" the director gets top billing, but ample credit also goes to the screenwriter, cinematographer, sound designer & so on.
"Fine art" is an exception to the rule and I think this has to do with a mythology built around the artist that began in the modern era, coinciding with the movement in European painting from frescoes embedded in architectural setting to oil on canvas and the advent of the art object as a commodity. During the modern era and up through modernism, it became much more common for artists (and painters in particular) to work alone in their studios etc. etc.
Today, the role and scale of art has shifted again, and more craftspeople are often involved in the production of a single artwork than they were in the 1700s through the 1950s, but the mythology and institutional frames available remain stuck on the model of the single creator. I think this is just one of the many contradictions between material realities of contemporary art and the narratives and markets built around them. Maybe (hopefully) we're beginning to call some of that into question.
As an artist who has worked for other artists in the role of fabricator, there is a funny feeling when an artist hasn't touched (much less, seen, in one case!) the artwork that you've built for them until it's displayed under their name. In these cases I've never felt personally slighted, but it's weird knowing that only a subset of people working in the art world - artists, fabricators, gallerists, etc. - understand how many peoples' work often goes into making a big ambitious show. I think film-style credits would be an appropriate acknowledgement and some artists are actually beginning to do this.
It is domain-specific and their current promotional material makes it look like an expanded DAW a la Ableton Live, but you can develop all kinds of software in Max, not that you necessarily should.
http://vanilla-js.com/