Worked at a place that got obsessed with same or next day shipping. It was clearly killing employee morale and we weren’t selling anything that people needed that quickly. Make a special premium instant ship or something for the people having an emergency but not for everyone. The killer for me was that they were at times doing mandatory overtime during the week and then sending you home early on your required weekend shift so you could have the suck of getting your evenings and schedules killed but without the extra pay.