Has the college academic job market always been highly competitive and elitist?

In general, you are right, and engineering is a lot less prestige-ridden overall. Or, more correctly, prestige is generally earned by the more recent accomplishments of a program, rather than by a history of rich and powerful people having attended the program. That is also how engineers are - they like seeing proof. The reputation of MIT among engineers is high because of its actual accomplishments.

The flip side is that engineers tend to be conservative, and for many, departments which have innovative ways of education or of developing new ways of looking at engineering solutions can lower the prestige of a program in the eyes of many of the older, more established engineering faculty.

That being said, even in engineering departments, there is no set formula for tenure - there are general expectations which are flexible. So they may look mostly at grants, publications and student reviews, but the T&P committee and the voting faculty may decide that what is “enough” for one tenure candidate is not enough for another.

There is also a wide streak of misogyny in many engineering departments, and there have been a number of cases in which what was considered “enough” for men was often not considered “enough” for women.

That depends on who is doing the hiring and the field. larger universities, in which the departments cover many subfields, and the subfields do the hiring generally follow that rule. So at a university with an ecology & evolution department, that department will hire faculty based on the program. However, if there is just a medium size biology department, which has a search committee made up of people who are not in ecology, will hire based on the general prestige of the biological sciences or the university itself.

LACs in general hire based on the prestige of the university from which they are hiring, rather than the program or the adviser. That is because a large part of their advertising includes the universities from which their faculty received their PhDs. The vast majority of parents have no knowledge of the nuances of program-level reputation, and only really are impressed by the “prestige” of the universities from which the faculty received their PhDs.