thanks for asking! so: 4 day work week model (look up Iceland for an example of this)

And yes, 4 hours/day in the morning, intent here is just for most mentally demanding work to take place then

Overall, the above is to serve as a core time structure/focus principle (so to be clear, am NOT claiming ALL types/levels of work can be fitted into just 16h/wk -- tho ~30h/wk is worth striving for, imo)

the idea is to optimize for quality, and grind as needed in the later part of the work day.