>>529036601
>What sort of shit rule is this, why would it have to restart?

NTA but Gabe mentioned in an interview a couple of years go that in Valve they like to work using "sessions".
1 session = 1 work day.
Anything that doesn't get finished in 1 session is scrapped and they start from 0 again the next day.
Basically they do not believe that any procedures should take longer than 1 day to be done.
If something takes longer than 1 day, then is scrapped and should be redone until it fits 1 session.
They do this because they believe that leaving stuff unfinished for the next day and piling up tasks is not good for mental health and productivity.
So they adopted that methodology.