I've got a pretty good idea of what I want to do, but I can't find anyone who'll hire me to do it.
Unfortunately for people of Hil's cohort, the academic job market has been getting more ruthlessly competitive every year, with a big boost in difficulty during the recession that just isn't resolving.
We now have people applying for beginning Assistant Professor jobs with 25 publications in good journals. Ten years ago that would have been ample to receive tenure. Twenty years ago it would have been enough for promotion to Full Professor. Forty years ago it was considered a respectable total output for a 30 year career.
Now, it just gets you in the door for an interview. I'm sure that in math or physics, where each publication tends to be more important and of more lasting effect, the numbers are different, but the same ramping up of expectations is there. It's a very difficult environment right now.
On the other hand, there are lots of jobs in academia-adjacent settings: med schools, policy institutes,government and industry interested in quantitative skills or big-data applications. Usually with more reasonable hours less eccentricity to deal with. That's the big shift in where people are getting jobs.