It took me a good part of 2020 to write up my PhD thesis. I began writing right when I was hit by a life-threatening depression. I could not make any progress for months while being pressured by my next employer to submit the thesis quickly so I could start the new job. What took me 9 months should really have been 2 or 3. I was able to finish only because one of my best friends was very supportive and had a few calls with me to help me with organising myself.