I'm just an adjunct and will likely never break into the tenure track (not having a master's degree being one of many factors against me), but I was sad to see that even this purportedly slow and deliberate process be affected to some degree by ageism. A good friend of mine entered grad school (in the humanities) around 2004, when most folks he knew were easily finding tenure-track jobs after their PhDs. He found himself the runner-up for highly-contested jobs, and family events took him out of the hunt for a bit, but as the years went on and he was content to be hired by not top-tier schools, he ran into the "We'd love to hire you but your resumé is
too prestigious for us and you might just use us as a stepping stone" and "If you haven't been snapped up despite such a great pedigree, then something must be wrong with you". He eventually got a tenure-track offer which he happily accepted, but he was close to giving up on his decade-long career path.
I think these struggles are endemic to nearly all professions but it seems to me that in academia, there's fewer opportunities to get tenure-track (or non-tenure, but decently-paying) positions once you've deviated from the usual path, even before you factor in the scarcity.