I'll try to sum up the main points:
Changes in my health status and job collided messily during the first six months of this year. My employer and I tried to come to an accommodation. It didn't work. I didn't feel like I could take another day of it and quit with my doctor's blessing. I am now engaged in a full-time investigation of other, more suitable endeavors.
That last part's not easy, but pretty excellent, actually.