- cooperation (working at the same time helps)

- out of tune bodies because of artificial light (I tend to days longer than 24h. When left alone I will at some point stay awake til sunrise, than maybe try to skip the nights sleep and end up falling asleep at 3pm anyways)

- stupid bureaucracy

In any way, even with a job keeping my clock straight, I'd very much welcome the option to sleep until 11am or something. I'm still not a morning person after all...

Same for me... I sometimes sleep 12 hours a night, sometimes 0. Having worked remotely with flex time for the last 5 years, I have to say, it isn’t that hard to communicate with colleagues even without a set schedule. People are almost always awake at noon.