I became sick during college, so I never worked full time. But during my final semester, when my ME/CFS returned after about a year of remission, I had to student teach full time and attend classes in the evening. Had I been a professional teacher, I would have completed the school year but I can't imagine that I would have returned to full time work the following year.
I worked very part time for the year following my graduation with the intention of taking just a year off to get my medical issue under control before going to work full time, but that never happened. I have been working half-time, mostly from home, for 10 years since then.
I wonder: how many people leave full-time work believing that it would be just a temporary absence or a temporary lessening of hours, as I did? And how does that number compare with people who know for sure that they are leaving full time work (in the absence of a medical miracle).