I truly don’t see how doing so would adversely affect any company. If they need the additional labor an extra eight hours can provide, they can hire someone else at 32 hours/week to cover it with an overlapping schedule. If the business is smaller, they can pay overtime.
Anecdotally, my own job doesn’t require me to work eight hours every day. Shit, I’m lucky to do four hours of actual work in a day. The amount of work ebbs and flows, but I find myself more often than not watching YouTube on my work computer simply because there’s literally no more work for the day.
And so cutting to 32 hours a week helps. I didn't make this standard it just goes this way because of the career.
Truckers, Doctors, Nurses all deal with similar schedule issues and it is usually because we can't just hand out workload over you have to know what is going on, nobody can just walk in and take over.