[dookahku]

how productive can a person bee if they wake up, immediately commute to work, labor for 12 hours(!), and then immediately commute home, sleep?

[ohnoitsahuman]

Very. At least for the first decade.

The say goodby to sanity, family, and hobbies.

[dookahku]

I'm dubious about this. I've worked similar schedules and I just didn't see a point in living.

[wiseowise]

No way this is true. Especially decade part. After a decade of such work you’ll age at least 20 years.

[smallmancontrov]

Maybe a bit more, so the beatings will continue until morale improves. The accounting happens in the birth rate.